问题
选择题
—How many years has life been on earth?
— years, I think.[ ]
A. 5 millions
B. 5 millions of
C. Million of
D. Millions of
答案
答案：D
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—How many years has life been on earth?
— years, I think.[ ]
A. 5 millions
B. 5 millions of
C. Million of
D. Millions of
答案：D