.There are over 58,000 rocky objects in__________ space,about 900 of which could fall down onto earth.
A.the rhe | B.不填 the | C.the不填 | D.a the |
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.There are over 58,000 rocky objects in__________ space,about 900 of which could fall down onto earth.
A.the rhe | B.不填 the | C.the不填 | D.a the |