问题

More teens are smoking in Beijing, ______ the number of primary and middle school students picking up the habit has more than doubled from previous years.

A:which
B:when
C:where
D:that

正确答案是：

同类题型

my surprise, Jin Ming was chosen into our school football team.—Congratulations. He did well playing football when he was very young. I hope he’ll be the best player in our school.

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