18.The students__________ their experiments when a stranger broke into the lab.( )
A. | had been doing | B. | have been doing | C. | would be doing | D. | were doing |
14.there was a lot of fun at yesterday's party.You ____ have come,but why didn't you?( )
A. | must | B. | shouldn't | C. | needn't | D. | ought to |
11.At this time tomorrow,I my favourite NBA games.( )
A. | enjoy | B. | will be enjoying | ||
C. | am enjoying | D. | have enjoyed |
10.We have taken so many warm clothes now that the weather in Sanya is hot now.( )
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A. | may not | B. | needn't | C. | can't | D. | mustn't |