问题
选择题
The origin of ____ life on earth is ____ question that interests astronomers.[ ]
A. the; the
B. \; a
C. \ ; the
D. the; a
答案
答案：B
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The origin of ____ life on earth is ____ question that interests astronomers.[ ]
A. the; the
B. \; a
C. \ ; the
D. the; a
答案：B