1.-These farmers have been to the United States .
-Really ? When _____ there ?
A.will they go B.did they go
C.do they go D.have they gone
解析：现在完成时与一般过去时容易混淆，就是因为它们所表示的动作都发生在过去，但二者又有区别：一般过去时表示过去某个时间发生的事、存在的状态或经常发生的动作，说话的侧重点在于陈述一件过去的事情，与现在没有关系；现在完成时表示与现在有关系的发生在过去的动作,它不与表示过去的时间状语（如yesterday，last week，a moment ago等）连用。故正确答案皆为B。
2. His father ______ the Party since 1978 .
A.joined B.has joined C. was in D.has been in
解析：现在完成时中,非延续性动词不能与for和since引导的表示一段时间的状语连用,通常是用相应的延续性动词来代替。故例的正确答为：D
3.Susan has been in this city for more than ten years.(改为同义句)
________more than ten years ____Susan ______to this city.
解析：据上题分析，且since引导的从句要用一般过去时，故填It is, since, came
4.My father ___________ (read) this book since yesterday.（用时态填空）
解析： 本题考查的是时态的运用，故应填have been reading / has read
5.A: Where ____________ Li Fei ___________?
B: He ____________ to Hainan Island.（用have(has) been /have(has) gone 填空）
解析：本题考查的是have (has) been 和have (has) gone的区别。表示“曾到过某地”要用 “have (has) been”; 表示“已经去某地”要用 “have (has) gone”。结合上下文，故应为: Where has Li Fei gone? B: He has gone to Hainan Island.
6. How can you possibly miss the news? It ______ on TV all day long.
A. has been B. had been C. was D. will be
解析： 信息句为一般现在时，根据后句中all day long判断，这显然是强调播放新闻对现在的影响，故选现在完成时。故应选A
7.She has set a new record, that is, the sales of her latest book______50 million.
A. have reached B. has reached C. are reaching D. had reached
解析：因为that is意为“换句话说，即 (=in other words, which means)”，而前句中的谓语has set是现在完成时，后一句的谓语动词也应用现在完成时，排除C和D; 又因主语the sales是复数，选出正确答案A。
