题目内容
In our class, some male students are fond of football ________ the rest of them are fond of basketball．
[ ]
A．
when
B．
while
C．
as
D．
since
答案：B
解析：
解析：
while表转折对比，when, as和since无此用法。
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题目内容
In our class, some male students are fond of football ________ the rest of them are fond of basketball．
when
while
as
since
while表转折对比，when, as和since无此用法。