题文
.( 辽宁卷22). There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.
| A．the; the | B．不填; the | C．the; 不填 | D．a; the |
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.( 辽宁卷22). There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.
| A．the; the | B．不填; the | C．the; 不填 | D．a; the |
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