填空题

His efforts to improve the sales of this product have been very (help) ______.

【参考答案】

helpful
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单项选择题
A. They won’t go to the party. B. They won’t be late. C. They will be late. D. They will stay at home.
A. They won’t go to the party. B. They won’t be late.
C. They will be late. D. They will stay at home.
填空题
Some American businessmen in China are spending a lot of time in (learn)______ Chinese.
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