问题
选择题
There are over 58,000 rocky objects in ________ space，about 900 of which could fall down onto ______ earth．[ ]
A．the；the
B．/；the
C．the；/
D．a；the
答案
答案：B
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There are over 58,000 rocky objects in ________ space，about 900 of which could fall down onto ______ earth．[ ]
A．the；the
B．/；the
C．the；/
D．a；the
答案：B