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Almost all gases, liquids and solids expand heated. [ ] A.whenB.how C.inD.by

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Almost all gases, liquids and solids expand heated. [ ] A.whenB.how C.inD.by

Almost all gases, liquids and solids expand ________ heated.

[]

A.whenB.howC.inD.by

试题答案

答案:A

提示:

“when+过去分词”意为“当被…时”,题中when heated等于when they are heated。