Life is like riding a bicycleyour balance, you must keep moving.A. KeepingB. To keepC.

发布时间：2020-08-17 09:59:46

Life is like riding a bicycle.      your balance, you must keep moving.
A. Keeping
B. To keep
C. Keep
D. Having kept

网友回答

A. Keeping
(答案→)B. To keep
C. Keep
D. Having kept
解析：B 考察非谓语动词。句义：生活就像骑自行车，为了保持平衡，你必须不断前进。根据句义可知此处应该使用不定式表示目的。故B正确。
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