I think have tried my best.All that can be done ___ .

I think have tried my best.All that can be done ___ .
A.has done B.has been done C.had done D.had been done
为什么选B
Benny521 1年前 已收到1个回答 举报

HOUHANBO1 幼苗

共回答了29个问题采纳率:100% 举报

因为这是强调动作对现在的影响,所以是用现在完成时

1年前

1
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