Between two classes,we usually have _____ break to help to rest our brains and eyes.We should open the windows to breathe some fresh air during the break.( )
【考点】复合形容词;不定冠词(a,an).
【答案】C
【解答】
【点评】
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发布:2024/8/3 8:0:9组卷:17引用:3难度:0.7