In September2008,China's key milestone in space travel( )whe

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In September2008,China's key milestone in space travel( )when Zhai Zhigang conducted the(见下方）
first spacewalk
A.reached B.was reached C.has reached D.had been reached
该题正确答案应选B,说明其他几项为什么不对,

1.首先应该用被动语态,所以A,C排除；
2.由于时间是2008年9月,用一般过去时态就可以了,不用过去完成时态.所以D不对.

In September2008,China's key milestone in space travel( )whe 英语翻译The transaction is a milestone in China's fragmented aut 为什么是Travel in space 而不是Travel in the space Travel in space英语作文作文快China's first man in space Yang Liwei Yang liwei's flight in space has great meaning ( ) China 问英语题（达人进）1.What's the fastest thing in space?Light.It travel If you travel in space in a space shuttle,you'll find your b 《travel in china》是哪里出的 Which is good travel company in China? ___great fun it is to travel in a space plane! Who__the first man to travel in space?选D 为什么