问题
选择题
Nobody knows exactly how many years it will be ________ the Chinese football team enters the final
stage of the World Cup.[ ]
A. when
B. before
C. since
D. until
答案
答案：B
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Nobody knows exactly how many years it will be ________ the Chinese football team enters the final
stage of the World Cup.[ ]
A. when
B. before
C. since
D. until
答案：B