摘要:第一节 单项填空(共15小题,每小题1分.满分15分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21. At that time the US was at war with Iraq, and Shirley worked as doctor in the army. A. a; a B. the; a C. /; a D. the; / pared with 2 million tons last year, our coal output has increased three times; that is to say, our coal output has increased 8 million tons this year. A. to; to B. to; by C. by; by D. by; to

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