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

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单项选择题

Which column of the bar chart represents the figures quoted（）

A.A
B.B
C.C

单项选择题

According to information in the text, leukaemia and pneumonia（）

A.are responsible for 84,000 deaths each year.
B.are strongly linked to cigarette smoking.
C.are strongly linked to lung cancer.
D.result in 30 per cent of deaths per year.