On June 29，2012，China’s Shenzhou-9 spacecraft landed________at the main landing area in northern China’s Inner Mongolia(内蒙古)．
A．safe
B．safely
C．safety
On June 29，2012，China’s Shenzhou-9 spacecraft landed________at the main landing area in northern China’s Inner Mongolia(内蒙古)．
A．safe
B．safely
C．safety
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