Small sailboats can easily turn over in the water ________.A．if not managed care

题干

Small sailboats can easily turn over in the water ________.

A．if not managed carefully	B．if are not managed carefully
C．unless not managed carefully	D．unless are not managed carefully

上一题下一题 0.15难度单项选择更新时间:2012-11-13 04:22:15

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