As we can see the work can’t be finished by only one person so let’s A. take a turnB. b

问题补充：

As we can see, the work can’t be finished by only one person, so let’s ．

A. take a turn

B. by turns

C. in turn

D. take turns

答案：

A. take a turn

B. by turns

C. in turn

(答案→)D. take turns

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