单项选择题


Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．Reasons for People’s Sleeping.
B．Four Stages of Sleep.
C．Reasons for sleepwalking.
D．A Sleep Experiment.
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Many food-carrying bags, made from high density polyethylene, are extremely difficult to recycle.
单项选择题
A．Because women do much work than men.B．Because people think women weaker than men.C．Because sport is easier for men than for women.D．Because in sport the two sexes are always separate.
A．Because women do much work than men.
B．Because people think women weaker than men.
C．Because sport is easier for men than for women.
D．Because in sport the two sexes are always separate.
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