we go swimming every day us a lot of good.A. If...do B. That...do C. If...does D. That..

问题补充：

we go swimming every day us a lot of good.

A. If...do

B. That...do

C. If...does

D. That...does

答案：

A. If...do

B. That...do

C. If...does

(答案→)D. That...does

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