15. this cake, you'll need 2 eggs, 175 g sugar and 175 g flour.
A. Having made B. Make C. To make D. Making
解析：答案是C 不定式作目的状语，表示做某事的目的。从“you’ll need 2 eggs，175 g sugar and 175 g flour”可知是“为了做这个蛋糕”，寻to make”。
16. –Did the book give the information you needed?
–Yes. But _____ it, I had to read the entire book.
A. to find B. find C. to finding D. finding
解析：答案是A 翻译：-你有没有从这本书中得到信息？-是，我必须读这本书，但是得找到它。选A的原因很简单，只有ACD可以做从句。C表示将要去找，D表示正在找，那只能是A了。虽然不定式同样有表将来的意思，不过要弱很多。
17. I feel greatly honored ____ into their society.
A. to welcome B. welcoming
C. to be welcomed D. welcomed
解析：答案是C 此题解：主语+feel+表语+不定式(主动或被动 to do ,to be done) 肯定是 不定式形式的，排除welcomed,因为 I 与welcome是被动关系，所以是 to be welcomed.
18. Don't sit there ________ nothing. Come and help me with this table.
A.saying B. said C. to say D. having said
解析：答案是A 根据句子结构判断所填的动词成为伴随状语，故选doing； doing nothing作伴随状语，相当于并列句and do nothing。 to do不可表伴随；A项do为谓语动词；D项若去掉and也正确。句意为“不要坐在那里什么也不干，来帮我摆这张桌子”。
19.---- Is Bob still performing?
---- I'm afraid not. He is said________ the stage already as he has become an official
A. to have left B. to leave C. to have been left D. to be left
解析：答案是A 此题考查学生对动词不定式的时态和语态的掌握和运用能力。首先leave作“离开” 讲时是不及物动词，没有被动形式；其次，句中的already 表示完成概念。因此选择表示主动兼完成的to have left。 leave the stage 离开舞台
20. _____ their hats into the air, the fans of the winning team let out loud shouts of victory.
A. To throw B. Thrown C. Throwing D. Being thrown
解析：答案是C 句意：把帽子扔到天空，获胜球队的粉丝发出胜利的欢呼。这里需要现在分词做状语，the fans 和throw是主动关系，用现在分词做状语，
21. __ to reach them on the phone, we sent an email instead.
A. Fail B. Failed C. To fail D. Having failed
解析：答案是D 句意：电话没有打通，我们就发了一个电子邮件。这里逗号后是句子，前面没有连词，故用非谓语动词，这里fail与we之间是主动关系,并且是先是打电话，然后发的电子邮件，故用分词的完成时，故选D。
22. ________ in the mountains for a week, the two students were finally saved by the local police
A. Having lost B. Lost C. Being lost D. Losing
解析：答案是B 此题考查的是分词作状语．题意为：在山区失踪了一周以后，这两个学生最终被当地的警察解救了．分词与主语之间的关系是被动关系，故排除A、D．分词所表示的动作先于谓语动词之前完成，排除C项．故答案为B．如①He was lost in thought．他想得很入神．②Lost in thought, he didn't hear the noise．他想得很入神，没有听到外面的吵闹声．"
23. --- There is a story here in the paper about a 110-year-old man.
--- My goodness! I can’t imagine _________ that old.
A.to be B. to have been C. being D. having been
解析：答案是C 动词imagine后接动词时要用动名词，不用不定式，故可排除A和B; 另外，由于此处谈的是现在的情况，即现在有110岁，故用一般式，不用完成式。
24. My sister, an inexperienced rider, was found sitting on the bicycle ___ to balance it.
A. having tried B. trying C. to try D. tried
解析：答案是B 此题考查非谓语动词的用法。句中的空格处动词与主语my sister构成主动关系，即try这个动作是my sister发出的，所以用trying表示她主动“设法/尝试着保持自行车平衡”。
25. If there is a lot of work ___, I'm happy to just keep on until it is finished.
A. to do B. to be doing C. done D. doing
解析：答案是A 此处to do在句中做定语修饰work，本句的意思是：如果有很多工作要做，我很乐意一直把它做完。 不定式做定语往往表示未发生的动作，放在被修饰词的名词、代词后。
26．After he became conscious，he remembered______and______on the head with s rod．
A．to attack;hit B．to be attacked；to be hit
C. attacking；be hit D．having been attacked；hit
解析：答案是D 从After he became conscious 这一语境中可知,“袭击”这个动作已经发生过了,主语“he”与“attack”是被动关系。 深化升华：remember既可以跟动名词,也可跟动词不定式作宾语,跟动名词表示该动作已经发生,跟动词不定式表示动作尚未发生。
27．It took a long time for the connection between body temperature and illness______.
A．to make B．to be made C．making D．being made
解析：答案是B 此题考查的是It takes a long time for…to do sth结构。to be made之所以要用不定式的被动式是因为the connection与make之间为被动关系，比较：make a connection(建立联系)。
28. Something as simple as ___ some cold water may clear your mind and relive pressure.
A. to drink B. drinking C. to be drinking D. drunk
解析：答案是B 考查动名词作主语的用法。句中的Something as simple as drinking some cold water共同作主语，谓语是clear和relieve。不定式虽然也可以作主语，但在此题中有as…as结构，所以要选择和something较一致的动名词而不是不定式。答案是B项。
A. Having made B. Make C. To make D. Making
解析：答案是C 不定式作目的状语，表示做某事的目的。从“you’ll need 2 eggs，175 g sugar and 175 g flour”可知是“为了做这个蛋糕”，寻to make”。
16. –Did the book give the information you needed?
–Yes. But _____ it, I had to read the entire book.
A. to find B. find C. to finding D. finding
解析：答案是A 翻译：-你有没有从这本书中得到信息？-是，我必须读这本书，但是得找到它。选A的原因很简单，只有ACD可以做从句。C表示将要去找，D表示正在找，那只能是A了。虽然不定式同样有表将来的意思，不过要弱很多。
17. I feel greatly honored ____ into their society.
A. to welcome B. welcoming
C. to be welcomed D. welcomed
解析：答案是C 此题解：主语+feel+表语+不定式(主动或被动 to do ,to be done) 肯定是 不定式形式的，排除welcomed,因为 I 与welcome是被动关系，所以是 to be welcomed.
18. Don't sit there ________ nothing. Come and help me with this table.
A.saying B. said C. to say D. having said
解析：答案是A 根据句子结构判断所填的动词成为伴随状语，故选doing； doing nothing作伴随状语，相当于并列句and do nothing。 to do不可表伴随；A项do为谓语动词；D项若去掉and也正确。句意为“不要坐在那里什么也不干，来帮我摆这张桌子”。
19.---- Is Bob still performing?
---- I'm afraid not. He is said________ the stage already as he has become an official
A. to have left B. to leave C. to have been left D. to be left
解析：答案是A 此题考查学生对动词不定式的时态和语态的掌握和运用能力。首先leave作“离开” 讲时是不及物动词，没有被动形式；其次，句中的already 表示完成概念。因此选择表示主动兼完成的to have left。 leave the stage 离开舞台
20. _____ their hats into the air, the fans of the winning team let out loud shouts of victory.
A. To throw B. Thrown C. Throwing D. Being thrown
解析：答案是C 句意：把帽子扔到天空，获胜球队的粉丝发出胜利的欢呼。这里需要现在分词做状语，the fans 和throw是主动关系，用现在分词做状语，
21. __ to reach them on the phone, we sent an email instead.
A. Fail B. Failed C. To fail D. Having failed
解析：答案是D 句意：电话没有打通，我们就发了一个电子邮件。这里逗号后是句子，前面没有连词，故用非谓语动词，这里fail与we之间是主动关系,并且是先是打电话，然后发的电子邮件，故用分词的完成时，故选D。
22. ________ in the mountains for a week, the two students were finally saved by the local police
A. Having lost B. Lost C. Being lost D. Losing
解析：答案是B 此题考查的是分词作状语．题意为：在山区失踪了一周以后，这两个学生最终被当地的警察解救了．分词与主语之间的关系是被动关系，故排除A、D．分词所表示的动作先于谓语动词之前完成，排除C项．故答案为B．如①He was lost in thought．他想得很入神．②Lost in thought, he didn't hear the noise．他想得很入神，没有听到外面的吵闹声．"
23. --- There is a story here in the paper about a 110-year-old man.
--- My goodness! I can’t imagine _________ that old.
A.to be B. to have been C. being D. having been
解析：答案是C 动词imagine后接动词时要用动名词，不用不定式，故可排除A和B; 另外，由于此处谈的是现在的情况，即现在有110岁，故用一般式，不用完成式。
24. My sister, an inexperienced rider, was found sitting on the bicycle ___ to balance it.
A. having tried B. trying C. to try D. tried
解析：答案是B 此题考查非谓语动词的用法。句中的空格处动词与主语my sister构成主动关系，即try这个动作是my sister发出的，所以用trying表示她主动“设法/尝试着保持自行车平衡”。
25. If there is a lot of work ___, I'm happy to just keep on until it is finished.
A. to do B. to be doing C. done D. doing
解析：答案是A 此处to do在句中做定语修饰work，本句的意思是：如果有很多工作要做，我很乐意一直把它做完。 不定式做定语往往表示未发生的动作，放在被修饰词的名词、代词后。
26．After he became conscious，he remembered______and______on the head with s rod．
A．to attack;hit B．to be attacked；to be hit
C. attacking；be hit D．having been attacked；hit
解析：答案是D 从After he became conscious 这一语境中可知,“袭击”这个动作已经发生过了,主语“he”与“attack”是被动关系。 深化升华：remember既可以跟动名词,也可跟动词不定式作宾语,跟动名词表示该动作已经发生,跟动词不定式表示动作尚未发生。
27．It took a long time for the connection between body temperature and illness______.
A．to make B．to be made C．making D．being made
解析：答案是B 此题考查的是It takes a long time for…to do sth结构。to be made之所以要用不定式的被动式是因为the connection与make之间为被动关系，比较：make a connection(建立联系)。
28. Something as simple as ___ some cold water may clear your mind and relive pressure.
A. to drink B. drinking C. to be drinking D. drunk
解析：答案是B 考查动名词作主语的用法。句中的Something as simple as drinking some cold water共同作主语，谓语是clear和relieve。不定式虽然也可以作主语，但在此题中有as…as结构，所以要选择和something较一致的动名词而不是不定式。答案是B项。
