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【题目】Yesterday we did ________experiment in our chemistry class. It's interesting.

A.aB.anC.theD./

【答案】B

【解析】

句意:昨天我们在化学课上做了一个实验。它很有趣。

考查冠词的用法。不定冠词aan有“一”的意思,表示泛指;定冠词the表特指。experiment(实验)以元音音素开头,需用an表泛指。根据句意语法,故选B

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