问题
选择题
The Shenzhou Ⅶ safely landed in China's northern grassland _____ flying in space for about 68 hours. [ ]
A. before
B. after
C. and
D. so
答案
答案：B
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The Shenzhou Ⅶ safely landed in China's northern grassland _____ flying in space for about 68 hours. [ ]
A. before
B. after
C. and
D. so
答案：B
