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英语单选16.-Each of the students,working hard at their lessons,_

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英语单选
16.-Each of the students,working hard at their lessons,____the book.
-So have I .
A is reading B has read C had read D reads
17.When he was alive ,the old scientist used to say that knowledge____from practice and he gained his experience by doing a lot of practical work.
A was coming B had come C comes D would come
18 -who's that good-looking girl LiHua is danceing with?
-I don't know.I ____ her before .
A have never seen B am not seeingC won't see D had never seen
19.- Why weren't you at the meeting yesterday?
-I ___for a long-distance call from my aunt in America now.
A waited B was waiting C had been waiting D had waited
20.I would have told them the answer,but I ____so busy then.
A would be B was C would have been D have been
分析 翻译等等 因为自己英语不好 所以找一些题来做做
英语单选16.-Each of the students,working hard at their lessons,_
B (因为回答里面有have,意思是“每个学生都很努力学习,都已经读完那本书.我也是")
C (因为后面是表示真理性的,)
A(强调对现在的影响,所以用现在完成时)
B(“你为什么没去参加会议”,“我当时正在等我姑姑从美国打来的长途电话”,now是指昨天开会的时间,所以用过去进行时)
B(前句为虚拟语气,后句为现实情况,用过去式即可)