52. _________ for the breakdown of the school computer network, Alice was in low spirits.
A. Blaming B. Blamed
C. To blame D. To be blamed
解析：答案是B。过去分词用作状语的典型特征是：表被动，可视为其前省略了“主语（即主句主语）+助动词be”。这类过去分词（短语）通常可根据具体的语境转换成相应的状语从句——即表原因的过去分词短语可转换成原因状语从句，表条件的过去分词短语可转换成条件状语从句，等等。根据句意可知，Alice与blame为被动关系，故选过去分词。Blamed for…在此表原因，故可转换成原因状语从句：Because she was blamed for the breakdown of the school computer network…
53. Please remind me ______ some eggs for the coming party.
A. buy B. to buy C. of buying D. for buying
解析：答案是B remind sb.to do sth.
54. The purpose of new drugs used on patients is to make them less painful, _____ them more terrible
A. not make B. not to make C. not making D. do not make
解析：答案是B。如两个不定式表示并列关系时,后一不定式前可省去to;表示对比关系时;不定式符号to常保留。
55.______ to work overtime that evening, I missed a wonderful film.
A. Having been asked B. To ask C. Having asked D. To be asked
解析：答案是A。确定非谓语动词时态方法是看非谓语动词所表示的动作是发生在谓语动词之前还是之后——若发生在谓语动词之前，则非谓语动词用完成式；否则，就用一般式。从时间上看，显然“被要求加班”在“错过看电影”之前，故非谓语动词要用完成式，据此可排除B和D；又因为动词 ask 与句子主语之间为逻辑上的动宾关系，由此可排除表示主动意义的选项C。句意为：由于那天晚上我被要求加班，所以我错过了一场很好的电影。又如：Having been his own boss for such a long time, he found it hard to accept orders from another. 自己当老板已经这么久了，他觉得难以听从别人的差遣。
56. —It’s a long time since I saw my sister.
—_______________ her this weekend?
A. Why not visit B. why not to visit
C. Why not visiting D. Why don’t visit
解析：答案是A 考查搭配。Why not + V原形……为什么不呢?句意：好久没见我姐姐了？——这个周末为什么不去看望她呢？
57.He got up late and hurried to his office, ______ the breakfast untouched.
A. left B. to leave C. leaving D. having left
解析：答案是C。根据句子语境以及选项动词leave的意思可知，空格处所填之词在此表结果，而英语中表示结果的非谓语动词通常就是现在分词，故选leaving。又如：A man rushed past and jogged her elbow, making her drop the bag. 一个男人从她身边匆匆走过，轻轻碰了一下她的肘部，结果她的袋子掉了。
58. Don’t say anything at the meeting unless ______.
A. asking B. asked C. being asked D. to be asked
解析：答案是B 省略句，被动语态Don't say anything at the meeting unless (you are) asked. 不要在会议上说话，除非你被要求说话。
59. _________ the pieces of cloth with a loose stitch before finally _________ them together.
A. Join, to sew B. Joining, sewing C. Join, sewing D. To join, to sew
解析：答案是C join动词原形引导祈使句，sewing在before之后，介词后的动词要用动词的现在分词形式
60.China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from ______ in the South China Sea.
A. attacking B. having attacked C. being attacked D. having been attacked
解析：答案是C。判断非谓语动词是要用主动式还是被动式，最基本的办法是看非谓语动词的逻辑主语与非谓语动词之间是主谓关系还是动宾关系——若是主谓关系，则非谓语动词用主动式；若是动宾关系，则非谓语动词用被动式。考查 prevent sb (sth) from doing sth 结构，其意为“阻止某人（某物）做某事”。根据句意，Chinese fishing boats 与 attack 之间为被动关系，故动名词要用被动式，可排除A和B；再根据动作的先后关系，可排除D。句意为：中国最近加紧黄岩岛附近的水域控制来防止中国渔船在南海被袭击。又如：The most important trees were tagged to protect them from being damaged by construction machinery. 最珍贵的树木都被贴上了标签，以防被建筑机械毁坏。
61. She wrote a famous book, and so _________ a place in history.
A. winning B. to win C. to have won D. won
解析：答案是D and so won a place…可视为 and so he won a place…之省略。
62. The radio announced that all flights ______ have been cancelled because of the fog.
A. go out B. gone out C. going out D. will go out
解析：答案是C 电台宣布由于大雾，所有起飞的航班都取消了。
63. —The last one __________________ pays the meal.
—Agreed!
A. arrived B. arrives C. to arrive D. arriving
解析：答案是C 本题考查不定式作后置定语。选C是因为名词前若有序数词修饰时,其后常用不定式作后置定语。如：The first passenger to get on the bus was a woman.第一个上公共汽车的乘客是一名妇女。一个句子不能同时有两个谓语，故选B错误。
64.Tony lent me the money, _______ that I’d do as much for him.
A. hoping B. to hope C. hoped D. having hoped
解析：答案是A。根据句子语境以及选项动词hope的意思可知，空格处所填之词在此表伴随，而英语中表示伴随的非谓语动词通常就是现在分词，故选hoping。句意为：托尼把钱借给了我，希望我能尽力为他工作。又如：She rushed past the policeman, hoping he wouldn’t ask what she had in her suitcase. 她赶紧从警察身边走过去，希望他不会问起手提箱里有什么。
65. I smell something __________ in the kitchen. Can I call you back in a minute?
A. burning B. burnt C. being burnt D. to be burnt
解析：答案是A 考查分词做宾语补足语。本题的something与burn构成主动的关系，且表示正在进行。句意：我闻到厨房里有地下烧焦了。我能不能一分钟以后给你电话呢？根据句意说明是现在正在发生的事情，故使用现在分词做宾语补足语。故A正确。
66. What’s the use ______ extra leisure time if you don’t know what to do?
A. have B. to have C. being have D. of knowing
解析：答案是D 意思是如果你根本不知道如何利用休闲时间的话，那你还要它干吗呢？ 这里的to have是接use，to是介词。
67. Oil prices have risen by 32 percent since the start of the year, _________ a record US$ 57.65 a barrel on April 4.
A. have reached B. reaching C. to reach D. to be reaching
解析：答案选B。用作结果状语时，可用现在分词或不定式，一般要用现在分词，不定式用作结果状语主要用于某些特定句式中。伴随着谓语动词的发生而产生的自然结果，用现在分词作结果状语。
68. ______ mathematical concepts of some students was very difficult because the students did not have a math background.
A. Explain B. Explaining C. Have explained D. Having explained
解析：答案是B 因为做主语，所以A和C淘汰了，因为动名词才能作主语。句意为：向学生解释数学的内容是很难得因为学生没有学习数学的背景.
A. Blaming B. Blamed
C. To blame D. To be blamed
解析：答案是B。过去分词用作状语的典型特征是：表被动，可视为其前省略了“主语（即主句主语）+助动词be”。这类过去分词（短语）通常可根据具体的语境转换成相应的状语从句——即表原因的过去分词短语可转换成原因状语从句，表条件的过去分词短语可转换成条件状语从句，等等。根据句意可知，Alice与blame为被动关系，故选过去分词。Blamed for…在此表原因，故可转换成原因状语从句：Because she was blamed for the breakdown of the school computer network…
53. Please remind me ______ some eggs for the coming party.
A. buy B. to buy C. of buying D. for buying
解析：答案是B remind sb.to do sth.
54. The purpose of new drugs used on patients is to make them less painful, _____ them more terrible
A. not make B. not to make C. not making D. do not make
解析：答案是B。如两个不定式表示并列关系时,后一不定式前可省去to;表示对比关系时;不定式符号to常保留。
55.______ to work overtime that evening, I missed a wonderful film.
A. Having been asked B. To ask C. Having asked D. To be asked
解析：答案是A。确定非谓语动词时态方法是看非谓语动词所表示的动作是发生在谓语动词之前还是之后——若发生在谓语动词之前，则非谓语动词用完成式；否则，就用一般式。从时间上看，显然“被要求加班”在“错过看电影”之前，故非谓语动词要用完成式，据此可排除B和D；又因为动词 ask 与句子主语之间为逻辑上的动宾关系，由此可排除表示主动意义的选项C。句意为：由于那天晚上我被要求加班，所以我错过了一场很好的电影。又如：Having been his own boss for such a long time, he found it hard to accept orders from another. 自己当老板已经这么久了，他觉得难以听从别人的差遣。
56. —It’s a long time since I saw my sister.
—_______________ her this weekend?
A. Why not visit B. why not to visit
C. Why not visiting D. Why don’t visit
解析：答案是A 考查搭配。Why not + V原形……为什么不呢?句意：好久没见我姐姐了？——这个周末为什么不去看望她呢？
57.He got up late and hurried to his office, ______ the breakfast untouched.
A. left B. to leave C. leaving D. having left
解析：答案是C。根据句子语境以及选项动词leave的意思可知，空格处所填之词在此表结果，而英语中表示结果的非谓语动词通常就是现在分词，故选leaving。又如：A man rushed past and jogged her elbow, making her drop the bag. 一个男人从她身边匆匆走过，轻轻碰了一下她的肘部，结果她的袋子掉了。
58. Don’t say anything at the meeting unless ______.
A. asking B. asked C. being asked D. to be asked
解析：答案是B 省略句，被动语态Don't say anything at the meeting unless (you are) asked. 不要在会议上说话，除非你被要求说话。
59. _________ the pieces of cloth with a loose stitch before finally _________ them together.
A. Join, to sew B. Joining, sewing C. Join, sewing D. To join, to sew
解析：答案是C join动词原形引导祈使句，sewing在before之后，介词后的动词要用动词的现在分词形式
60.China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from ______ in the South China Sea.
A. attacking B. having attacked C. being attacked D. having been attacked
解析：答案是C。判断非谓语动词是要用主动式还是被动式，最基本的办法是看非谓语动词的逻辑主语与非谓语动词之间是主谓关系还是动宾关系——若是主谓关系，则非谓语动词用主动式；若是动宾关系，则非谓语动词用被动式。考查 prevent sb (sth) from doing sth 结构，其意为“阻止某人（某物）做某事”。根据句意，Chinese fishing boats 与 attack 之间为被动关系，故动名词要用被动式，可排除A和B；再根据动作的先后关系，可排除D。句意为：中国最近加紧黄岩岛附近的水域控制来防止中国渔船在南海被袭击。又如：The most important trees were tagged to protect them from being damaged by construction machinery. 最珍贵的树木都被贴上了标签，以防被建筑机械毁坏。
61. She wrote a famous book, and so _________ a place in history.
A. winning B. to win C. to have won D. won
解析：答案是D and so won a place…可视为 and so he won a place…之省略。
62. The radio announced that all flights ______ have been cancelled because of the fog.
A. go out B. gone out C. going out D. will go out
解析：答案是C 电台宣布由于大雾，所有起飞的航班都取消了。
63. —The last one __________________ pays the meal.
—Agreed!
A. arrived B. arrives C. to arrive D. arriving
解析：答案是C 本题考查不定式作后置定语。选C是因为名词前若有序数词修饰时,其后常用不定式作后置定语。如：The first passenger to get on the bus was a woman.第一个上公共汽车的乘客是一名妇女。一个句子不能同时有两个谓语，故选B错误。
64.Tony lent me the money, _______ that I’d do as much for him.
A. hoping B. to hope C. hoped D. having hoped
解析：答案是A。根据句子语境以及选项动词hope的意思可知，空格处所填之词在此表伴随，而英语中表示伴随的非谓语动词通常就是现在分词，故选hoping。句意为：托尼把钱借给了我，希望我能尽力为他工作。又如：She rushed past the policeman, hoping he wouldn’t ask what she had in her suitcase. 她赶紧从警察身边走过去，希望他不会问起手提箱里有什么。
65. I smell something __________ in the kitchen. Can I call you back in a minute?
A. burning B. burnt C. being burnt D. to be burnt
解析：答案是A 考查分词做宾语补足语。本题的something与burn构成主动的关系，且表示正在进行。句意：我闻到厨房里有地下烧焦了。我能不能一分钟以后给你电话呢？根据句意说明是现在正在发生的事情，故使用现在分词做宾语补足语。故A正确。
66. What’s the use ______ extra leisure time if you don’t know what to do?
A. have B. to have C. being have D. of knowing
解析：答案是D 意思是如果你根本不知道如何利用休闲时间的话，那你还要它干吗呢？ 这里的to have是接use，to是介词。
67. Oil prices have risen by 32 percent since the start of the year, _________ a record US$ 57.65 a barrel on April 4.
A. have reached B. reaching C. to reach D. to be reaching
解析：答案选B。用作结果状语时，可用现在分词或不定式，一般要用现在分词，不定式用作结果状语主要用于某些特定句式中。伴随着谓语动词的发生而产生的自然结果，用现在分词作结果状语。
68. ______ mathematical concepts of some students was very difficult because the students did not have a math background.
A. Explain B. Explaining C. Have explained D. Having explained
解析：答案是B 因为做主语，所以A和C淘汰了，因为动名词才能作主语。句意为：向学生解释数学的内容是很难得因为学生没有学习数学的背景.
