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(一)1 Few students can understand the sentence until it _____

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(一)
1 Few students can understand the sentence until it _____ twice or three times.
A explains B is explained C will be explained D has explained
2 ----Did you go to Jim'sbirthday party?
----No,I ____
A haven't invited B didn't invite C am not invited D wasn't invited
3 When and where to build the new school ______
A is not decided B are not decided C has not decided D have not decided
4 ----Can sixteen-year-olds drive their cars to school?
----No,they shonldn't ______ to drive because they are not serious enough.
A allow B allowed C be allowed D have allowed
5 Don't discuss the problems with your partner unless you____ to do so.
A ask B are asked C will ask D will be asked
1.B,前后时态是一般现在时,并且sentence 所以,is explained.2.D.被动语态的过去式.过去没被邀请参加,所以wasn't invited.3.A,When and where to build the new school 一般来说,句子或短语作为主语,谓语动词是用单数...