单项选择题

A．The air quality is not as serious as the woman says.
B．The air pollution is due to the industrial development.
C．There were no factories here before.
D．They should move to another city.
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单项选择题
A．Call on people to protect sharks.B．Point out the living environment of sharks.C．Explain why the sharks are dangerous.D．An introduction to sharks.
A．Call on people to protect sharks.
B．Point out the living environment of sharks.
C．Explain why the sharks are dangerous.
D．An introduction to sharks.
单项选择题
A．To borrow his book.B．To talk about the term paper.C．To invite him to go canoeing.D．To ask him out for dinner.
A．To borrow his book.
B．To talk about the term paper.
C．To invite him to go canoeing.
D．To ask him out for dinner.
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