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        1. 【題目】—What did you do last night, Mike?

          —First I did my homework, and then I played basketball for half ________ hour.

          A.aB.anC.theD./

          【答案】B

          【解析】

          句意:——你昨晚做了什么,邁克?——我先做作業(yè),然后打了半個小時的籃球。

          考查冠詞。a/ an一個,不定冠詞,表示泛指;the定冠詞,表示特指;根據(jù)句意理解可知,空格處指的是“半小時”,英語中hour是元音音素開頭的單詞,所以前面應該用an,構(gòu)成half an hour的結(jié)構(gòu),故選B。

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