Hot metal _____ as it grows cooler.

问题描述:

Hot metal _____ as it grows cooler.
A.contracts
B.reduces
C.condenses
D.compresses
为什么选a?
四个选项解释是什么?

contracts:金属、肌肉等收缩,使金属、肌肉等收缩;使缩小.reduces:数量、力量等的减少,缩减,减弱;缩小大小、程度等;贬低价值,下降.condenses:液体浓缩.compresses:压缩空气.综上,只有a项符合提议.题干的句意为...