D.has said to have bought 解析:选B。本题考查动词不定式及时态的应用。因为say与主语(人)是动宾关系,所以应用被动语态;再由括号中的时间标志可知应用现在完成时。故选B。 2.It is often ________that human beings are naturally equipped to speak. A.said
B.to say C.saying
D.being said 解析:选A。句意为:经常听人说人类天生有说话的能力。It is said that...为固定句式,意为“据说……”。 3.AIDS is said________the biggest health challenge to both men and women in that area over the past few years. A.that it is
B.to be C.that it has been
D.to have been 解析:选D。句意为:据说,在过去的几年中,艾滋病对于那个地区的男女来说已是最大的健康挑战。It is said that从句可转换为Sb./Sth.be said to do/to be doing/to have done的形式。由此可淘汰A、C两项,由句子中的时间状语over the past few years可知要用完成时,所以淘汰B项,故选D。 4.________in the queue for half an hour,the old man suddenly realized he had left the cheque in the car. A.Waiting
B.To wait C.Having waited
D.To have waited 解析:选C。本题考查非谓语动词。根据the old man与wait之间的关系,应该选择v.ing形式,再根据句意得知他是先“wait”后才“realize”。所以先发生的动作应该用完成式having waited。 5.The children went home from
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