第19页

信息发布者：
How
often
on
weekends
How
many
times
How
long
did
do
C
How many students are 
there in your class
C
How often do your classmates exercise
A
Sure/Of course/Yes, I do
B
Do you often exercise
A
That's all right/You're welcome/ That's OK


C
C
B
C
B
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