单项选择题

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单项选择题
Why can’t astronauts drink water from cups
A．The water would float in drops in the air.
B．The water would be frozen in open cups.
C．Crumbs and cereal would float in the cups.
填空题
He tried his best (最好的) and in the end he found (发现，找到;创办) ont the owner (所有人) of the watch.He did his best and found the owner ________.
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