theircountry has plenty of oil; ours has none. A. While B. When C. Before D. Where 题目和参考答案——青夏教育精英家教网—

题目内容

　　 theircountry has plenty of oil; ours has none.

A. While　　 B. When　　 C. Before　　 D. Where

答案：A
解析：

题意是“他们的国家有丰富的石油，而我们国家却没有”。while可作“但是，而”解

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