问题
选择题
The problem of population may be one of the _____ ones in the world today. [ ]
A. most
B. most serious
C. great
D. more interesting
答案
答案：B
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The problem of population may be one of the _____ ones in the world today. [ ]
A. most
B. most serious
C. great
D. more interesting
答案：B
