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.并在答题卡上将该选项的标号涂黑.21. China will send its first Mars Rover, Yinghuo-1, into space by Russian space rocket in October 2009. A. 不填,the B. the; a C. 不填, a D. the; the

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