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

A.aB.anC.theD./

【答案】B

【解析】

句意:昨天我們?cè)诨瘜W(xué)課上做了一個(gè)實(shí)驗(yàn)。它很有趣。

考查冠詞的用法。不定冠詞aan有“一”的意思,表示泛指;定冠詞the表特指。experiment(實(shí)驗(yàn))以元音音素開(kāi)頭,需用an表泛指。根據(jù)句意語(yǔ)法,故選B。

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