89. I completely forgot ______ the front door last night and feel fortunate that nothing is stolen.
A. locking B. being locked C. to lock D. to have locked
解析：答案是C 由后面的庆幸没被偷走东西判断，应用C项表示“忘记锁门了(没有锁)”。
90. I am busy _____ for the entrance examination, so I can’t help _____ housework at home
A. preparing; doing B. preparing; to do
C. to prepare; doing D. to prepare; to do
解析：答案是B。be busy doing sth.意为“忙于干某事”;can’t help doing sth.意为“禁不住干某事”;can’t help (to) do sth.意为“不能帮忙干某事”。
91. David threatened his neighbour to the police if the damages were not paid.
A. to be reported B. reporting
C. to report D. having reported
解析：答案是C threaten to do是固定搭配 威胁要做某事
92. He told us whether _________ a picnic was still under discussion
A. to have B. having C. have D. had
解析：答案是B. 考查非谓语的用法，分析句子可知whether +to do sth. 做了宾语从句的主语, He told us 后省略了宾语从句的引导词that。
93. _____ the big snake, the little girl stood under the tree _____ out of life.
A. Seeing; frightened B. Seeing; frightening
C. Seen; frightened D. To see; frightening
解析：答案是A。Seeing;frightened 此处主语the little girl与动词see是主谓关系，故用现在分词作状语；英语中作形容词用的-ing分词常用来修饰物，作形容同用的-ed分词常用来修饰人，但当修饰人的表情、眼神、叫声等时常用-ed分词。
94. I regret ______ you that your application has been refused.
A. informing B. being informed C. to be informed D. to inform
解析：答案是D regret to do sth 意思是遗憾将要做某事 regret doing sth 意思是后悔做过某事
95. I didn’t mean ______ anything, but these apples looked so good I couldn’t resist ______ one.
A. to eat，trying B. to eat，o trying
C. eating，to try D. eating，to trying
解析：答案是A mean to do sth 打算做某事 resist doing sth.抵制做某事
96. A doctor can expect _____ at any hour of the day or night.
A. calling B. to call C. being called D. to be called
解析：答案是D。expect后跟不定式作宾语,call与doctor之间是被动关系。
97. Bill suggested _____ a meeting on what to do for the Shanghai Expo during the vacation.
A. having held B. to hold C. holding D. hold
解析：答案是C 考查动名词做宾语：suggest后面用动名词做宾语，句意：比尔建议就假期中可以为上海世博会做什么开个会。选C。 英语中有些动词只能接动名词做宾语，如consider，suggest， imagine，mind，practise，dislike，miss，postpone等平时要加强记忆。
98. The boy often gives a satisfactory answer to the teacher’s question, _____ just a minute. So he’s usually the teacher’s pet.
A. thought B. having thought C. and to think D. thinking
解析：答案是B。-ing形式短语作状语,且think(思考)表示的动作发生于give a satisfactory answer之前,故用having thought。
99. I know it isn’t important but I can’t help ______ about it.
A. but to think B. thinking C. think D. to think
解析：答案是B can't help doing sth 情不自禁做某事
100. Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.
A. seated B. seating C. to seat D. seat
解析：答案是A 考查非谓语的用法。remain后可接adj, v-ing, v-ed和to be done 等多种形式做表语，在该题中可以把seated视为一个形容词，所以正确答案为A。
A. locking B. being locked C. to lock D. to have locked
解析：答案是C 由后面的庆幸没被偷走东西判断，应用C项表示“忘记锁门了(没有锁)”。
90. I am busy _____ for the entrance examination, so I can’t help _____ housework at home
A. preparing; doing B. preparing; to do
C. to prepare; doing D. to prepare; to do
解析：答案是B。be busy doing sth.意为“忙于干某事”;can’t help doing sth.意为“禁不住干某事”;can’t help (to) do sth.意为“不能帮忙干某事”。
91. David threatened his neighbour to the police if the damages were not paid.
A. to be reported B. reporting
C. to report D. having reported
解析：答案是C threaten to do是固定搭配 威胁要做某事
92. He told us whether _________ a picnic was still under discussion
A. to have B. having C. have D. had
解析：答案是B. 考查非谓语的用法，分析句子可知whether +to do sth. 做了宾语从句的主语, He told us 后省略了宾语从句的引导词that。
93. _____ the big snake, the little girl stood under the tree _____ out of life.
A. Seeing; frightened B. Seeing; frightening
C. Seen; frightened D. To see; frightening
解析：答案是A。Seeing;frightened 此处主语the little girl与动词see是主谓关系，故用现在分词作状语；英语中作形容词用的-ing分词常用来修饰物，作形容同用的-ed分词常用来修饰人，但当修饰人的表情、眼神、叫声等时常用-ed分词。
94. I regret ______ you that your application has been refused.
A. informing B. being informed C. to be informed D. to inform
解析：答案是D regret to do sth 意思是遗憾将要做某事 regret doing sth 意思是后悔做过某事
95. I didn’t mean ______ anything, but these apples looked so good I couldn’t resist ______ one.
A. to eat，trying B. to eat，o trying
C. eating，to try D. eating，to trying
解析：答案是A mean to do sth 打算做某事 resist doing sth.抵制做某事
96. A doctor can expect _____ at any hour of the day or night.
A. calling B. to call C. being called D. to be called
解析：答案是D。expect后跟不定式作宾语,call与doctor之间是被动关系。
97. Bill suggested _____ a meeting on what to do for the Shanghai Expo during the vacation.
A. having held B. to hold C. holding D. hold
解析：答案是C 考查动名词做宾语：suggest后面用动名词做宾语，句意：比尔建议就假期中可以为上海世博会做什么开个会。选C。 英语中有些动词只能接动名词做宾语，如consider，suggest， imagine，mind，practise，dislike，miss，postpone等平时要加强记忆。
98. The boy often gives a satisfactory answer to the teacher’s question, _____ just a minute. So he’s usually the teacher’s pet.
A. thought B. having thought C. and to think D. thinking
解析：答案是B。-ing形式短语作状语,且think(思考)表示的动作发生于give a satisfactory answer之前,故用having thought。
99. I know it isn’t important but I can’t help ______ about it.
A. but to think B. thinking C. think D. to think
解析：答案是B can't help doing sth 情不自禁做某事
100. Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.
A. seated B. seating C. to seat D. seat
解析：答案是A 考查非谓语的用法。remain后可接adj, v-ing, v-ed和to be done 等多种形式做表语，在该题中可以把seated视为一个形容词，所以正确答案为A。
