It ______ long befor the Chinese Space Center ______ Shenzhou VII Spacecraft,becoming the third country to send an astronaut to "walk" in space after the United States and the former Soviet Union (now Russia).

A．will not be,launches

B．was not,launched

C．will be,launches

D．was not,had launched

一般而言，垄断是指单一的个人、组织或集团排他性地控制某种（）

A.经济资源

B.产品

C.技术

D.市场