题目内容

He pursued his ________ of collecting stamps for so many years.

A. habit
B. custom
C. hobby
D. activity

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Don’t drop your cigarette butts on the floor. You could ________ fire to the house.

A. cause
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I think it was your Dad ________ phoned.

A. what
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Scarcely had the speaker begun to talk ________ there were laughs.

A. then
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使用杀虫剂进行除虫灭害，应由()按照规定的使用方法进行;使用时()污染食品、食品接触面及包装材料，使用后应将所有设备、工具及容器彻底清洗。

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