单项选择题

As treatment for back pain the Clinic mainly recommends（）

A.pain killers.
B.relaxation therapy.
C.exercise routines.

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单项选择题
According to the speaker, the main cause of back pain in women is（）

A.pregnancy.
B.osteoporosis.
C.lack of exercise
单项选择题
Which column of the bar chart represents the figures quoted（）

A.A
B.B
C.C
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