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; a
D. a; /
网友回答
A. the; the
(答案→)B. /; the
C. the; a
D. a; /
解析：考查冠词：第一空不填，in space在太空，第二空填the，世界上独一无二的东西，如the earth，the sun要加定冠词the，选B。