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.不填; the C.the; 不填 D.a; the
B
练习册系列答案
相关题目
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.不填; the C.the; 不填 D.a; the
B