16.Mr Smith was having a meeting at that time, otherwise he ______________over to help us.
A. would have come
B. would come
C. had come
D. was going to come
【答案】A
【解析】考察虚拟语气。本题是一个含蓄条件句额虚拟语气。关键词是otherwise否则,要不然;根据前半句可知是与过去事实相反,故使用情态动词+have done。结合句意可知A正确。句意:在那时史密斯先生正在开会,要不然,他本会过来帮助我们的。
17.Not only John and Tom but also their sister, Mary, _______ great interest in the piano lessons.
A. take
B. takes
C. have taken
D. had taken
【答案】B
【解析】考察主谓一致。Not only…but also…做主语时,谓语动词后后一个保持一致。故本题与their sister Mary保持一致,用单数形式,本题又是一般现在时,故B正确。
18.Jack doesn’t smoke now, but he ______________ for almost twenty years.
A.was smoking
B.smoked
C.has smoked
D.had smoked
【解析】考察时态。本题容易错选C。实际上本题是描述在过去20年中所发生的事情,并不强调对现在的影响,故使用过去时就可以了,强调过去和现在的对比。句意:Jack现在不抽烟,但是他抽了几乎20年的烟。
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