24．fit we ought to learn more about our body and be careful with what we eat.A. KeepingB.

问题补充：

24．fit, we ought to learn more about our body and be careful with what we eat.

A. Keeping

B. To keep

C. Having kept.

D. To have kept

答案：

A. Keeping

(答案→)B. To keep

C. Having kept.

D. To have kept

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