4. It is reported that China’s first Mars probe Yinghuo-1 will be launched with the help

问题补充：

4. It is reported that China’s first Mars probe Yinghuo-1 will be launched with the help of Russian launch vehicle in Oct. . (China Daily)

A. 不填;a

B. the; a

C. 不填; the

D. the; the

答案：

(答案→)A. 不填;a

B. the; a

C. 不填; the

D. the; the

解析：A 可数名词前有物主代词或名词所有格等限制时前不加冠词。第二空表泛指。