—Mustwesavepaper?( ) —I'mafraidwe .A．needB．needn'tC．mustD．mustn't_刷题宝

题干

—Must we save paper? ( )
—I'm afraid we .

A．need

B．needn't

C．must

D．mustn't

上一题下一题 0.99难度选择题更新时间:2019-03-04 05:05:11

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