单项选择题

A．Grade all the homework.
B．Clean the professor’s office.
C．Help the professor in the classroom.
D．Sort all the documents.
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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.
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.
单项选择题
A．Because he wants to learn more about computer.B．Because he has a tight schedule.C．Because he wants to save money.D．Because he is a good friend of the woman’s.
A．Because he wants to learn more about computer.
B．Because he has a tight schedule.
C．Because he wants to save money.
D．Because he is a good friend of the woman’s.
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