问题
选择题
In September 2008,China’s key milestone in space travel____when Zhai Zhigang conducted
the first space walk.[ ]
A.reached
B.was reached
C.has reached
D.had been reached
答案
答案：B
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In September 2008,China’s key milestone in space travel____when Zhai Zhigang conducted
the first space walk.[ ]
A.reached
B.was reached
C.has reached
D.had been reached
答案：B