题目内容
8、Although everything seems to have been taken into consideration， accident can happen when the astronauts walk in space．
A．不填；the B．an；the C．the；the D．an；不填
试题答案
8、D
相关题目
Although everything seems to have been taken into consideration， accident can happen when the astronauts walk in space．
A．不填；the B．an；the C．the；the D．an；不填
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