1.Look!A large crowed of people are over there.(What's up?)
It must be a traffic accident.
如果選A應(yīng)該說
What's going on?
C.要改成What has happened?
兩個都不完整,所以要選擇B,What's up?（what's happening?)
2.It is strange that he (was) late for school yesterday.
其實這道題的幾個答案都不正確,按照后面的時間yesterday,應(yīng)該用過去時態(tài)was才正確.
A should have been 本應(yīng)該,
B would be 過去將來時
C had been 過去完成時,不能與昨天這個過去時間狀語同用
D will be 將來時
3.They asked me to have a drink with them.I said that it was at least ten years since I (had enjoyed) a good drink
這里說的是過去完成時,因為前面用的是asked過去時態(tài),而在此之前發(fā)生的事情,要用過去完成時態(tài).
4.Although we have been working in the same office for several ages,(doesn't leave) me much impression
A hasn't left B didn't leave C doesn't leave D isn't leaving
這道題,如果選擇A,意思是至今尚未；B.過去沒有; C.并沒有給我留下好印象（最合適）; isn't leaving現(xiàn)在進行時不符
從句中意思來看,雖然我們工作了很長時間,她仍未能給我留下好印象,后半部分是一個目前的事實陳述.因此用一般現(xiàn)在時.