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. 不填; the C. the; 不填 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. 不填; the C. the; 不填 D. a; the |
答案：B