单项选择题

The man want to know________.

A．how long the show will last
B．how to avoid lead poisoning
C．how the skyscraper was built
D．how glass and crystal differ
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单项选择题
What does the man do on Fridays
A．He goes to exercise classes.
B．He goes sailing.
C．He goes to the cinema.
D．He stays at home
单项选择题
The woman is probably________.
A．a pharmacist
B．a salesperson
C．a guide
D．an engineer
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