If a substance is dissolved in water or heated, it may ______ a gas.

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问题 If a substance is dissolved in water or heated, it may ______ a gas.

选项 A、give into
B、give off
C、give over
D、give away

答案B

解析 惯用搭配题。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。本句的难点是:give into为非固定搭配;give off意为“散发”;和gas搭配;give over意为“托付,交托”;give away意为“送掉,分发(奖品)等”。
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