题目

The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.  A. the; the              B. a; a              C. a; the     D. the; a   答案：D。 解析: 考查冠词的用法。第一空用the+n表示类别，是指blue whale 这一类动物；第二空用a表示泛指。 

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