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ask; write to ask; writing ask; writing to ask; to write
were, finish have, finished are, finished do, finish
Yes, I did Yes, I do No, I don’t No,I.’m not
turn on turn down turn off turn up
Did; finish Have; finished Do; finish Will; finish
finish finishing to finish finished
Are, do Do, do Will, do Are, doing
must finish will finish must be finished won’t finish
B.C.三个选项中选出可以填入空白处的最佳答案21. He can’t finish his homework in half ____________ hour. A. a an the /
finishes finish to finish finishing
.don’t didn’t won’t haven’t
finished have finished will finish finish
finish to finish is finished be finished
is finished will finish finish will be finished
finish have finished Will finish Finished
although when unless because
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