单项选择题

A．Whether second hand smoking is liked with cancer.
B．Whether active smoking is linked with cancer.
C．Whether passive smoking by children is liked with childhood cancers.
D．Whether an average degree of passive smoking is harmful.
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单项选择题
A．Fill out an application.B．Go back to the university to get his ID.C．Go to see his friend.D．Take a written exam and an eve exam.
A．Fill out an application.
B．Go back to the university to get his ID.
C．Go to see his friend.
D．Take a written exam and an eve exam.
单项选择题
A．At lunchtime.B．Later than breakfast time.C．As soon as he heard the breakfast bell.D．In time to have his breakfast.
A．At lunchtime.
B．Later than breakfast time.
C．As soon as he heard the breakfast bell.
D．In time to have his breakfast.
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