填空题
They come from different ______
A. country B. countries C. a country D. countrys
【参考答案】
B
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We hope your(suggest) ______will contribute to solving the problem.
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Would you mind ______ quiet for a moment I’m ______ out a form. A. keeping, flling B. keeping, to fill C. to keep, to fill D. to keep, filling
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