Question

【题目】Life is like riding a bicycle. ______your balance, you must keep moving.

A. Keeping B. To keep

C. Keep D. Being kept

Answer 1

【答案】B

【解析】句意：生活就像在骑自行车。为了保持平衡，你必须不断前进。考查非谓语动词。根据句意可知此处需用不定式作目的状语。故B正确。