国际投资环境评价往往只采取专家实地考察的方式。
参考答案:错
—Listen! Someone is singing in the next room. Who _______ it be? Is it Wei Fang?
—No. It _______ be her. She is at school now.[ ]
A. will; may not
B. must; mustn't
C. may; can't
D. may; won't
第一部分
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