单项选择题

A) Yes, you could. C) Mr. Gates is busy.
B) No, you couldn’t. D) Thank you so much.

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More than 20 (vary) ______ of crops, such as rice, cotton and peanuts, are grown.

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If the team members hadn’t helped me, I (tumble) ______in a stream.

A) Yes, you could. C) Mr. Gates is busy. B) No, you couldn’t. D) Thank you so much. 您的浏览器不支持 audio 元素。