Ifasubstanceisdissolvedinwaterorheated,itmay()agas.

A、giveinto
B、giveover
C、giveoff
D、giveaway
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正确答案:

C

答案解析:

「句意」 如果一种物质溶解在水里或被加热,它可能释放出一种气体。

「难点」 give into 为非固定搭配; give over 意为“托付, 交托”;give off 意为 “散发”;give away 意为“送掉,分发(奖品)等”。

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