52单词网 > 高中英语 > 高中英语题库 > This exercise requires carefully. We should do as we are required .A.to do; doin

This exercise requires carefully. We should do as we are required .A.to do; doin

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This exercise requires carefully. We should do as we are required .A.to do; doin

This exercise requires ________ carefully. We should do as we are required ________.

A.to do; doing

B.to be done; doing

C.to be done; to doing

D.doing; to do

试题答案

D

标签：doshouldweas

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