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    精英家教网 > 高中英语 > 题目详情
    (2013·凉山一模)Life is like riding a bicycle. ________ your balance, you must keep moving.
    A．KeepingB．To keep
    C．KeepD．Being kept
    B
    B　句意：生活就像在骑自行车。为了保持平衡，你必须不断前进。根据句意可知此处需用不定式作目的状语，故选B项。
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