填空题

Smoking (know) ______ to increase a person’s risk of developing lung cancer.

【参考答案】

is known
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单项选择题
A．The man’s teacher.B．The man’s English score.C．The man’s job.D．The man’s study.
A．The man’s teacher.
B．The man’s English score.
C．The man’s job.
D．The man’s study.
填空题
How did the man travel abroadIn __________________________ car.
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