English,Chinese and French are the main languages at UN

English,Chinese and French are the main languages at UN
English,Chinese and French are the main languages____at UN.
A.using B.to use C.used D.uses
选哪个?为什么?
babb 1年前 已收到1个回答 举报

fummer 幼苗

共回答了20个问题采纳率:95% 举报

C.used
这里是个定于从句,省略了Which are

1年前

6
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