In September 2008,China’s key milestone
题型:选择题
问题:
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
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