单项选择题

A．Write their lab report.
B．Find out Professor Smith’’s schedule.
C．Interview some high school students.
D．Finish their chemistry experiment.
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单项选择题
No one lives in the region of the lakes.
A．Y
B．N
C．NG
单项选择题
A．Employ them as lab assistants.B．Teach chemistry classes at their high school.C．Help them with their studies.D．Pay them for participating in the study.
A．Employ them as lab assistants.
B．Teach chemistry classes at their high school.
C．Help them with their studies.
D．Pay them for participating in the study.
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