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問題詳情:

 Inordertofindthemissingchild,villagers            allt...

 In order to find the missing child, villagers             all they can over the past five hours.

A. did        B. do     C. had done     D. have been doing

【回答】

D

知識點:現在完成進行時及其被動式

題型:選擇題

標籤: allt
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