问题描述：
Your friend ______ more if he wants to be thinner. A.needs to exercise B.needs exercising C.need ex
Your friend ______ more if he wants to be thinner.
A.needs to exercise
B.needs exercising
C.need exercising
D.needs exercise
Your friend ______ more if he wants to be thinner.
A.needs to exercise
B.needs exercising
C.need exercising
D.needs exercise
问题解答：
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