题目内容
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
C
解析:
略
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题目内容
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
C
略