Employ them as lab assistants．,Teach chemistry classes -找考题网

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.

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单项选择题

A．It’’s difficult to find birds for recording.B．It’’s difficult to find quiet areas for recording.C．It’’s difficult to find animals for recording.D．It’’s difficult to find mammals for recording.

A．It’’s difficult to find birds for recording.
B．It’’s difficult to find quiet areas for recording.
C．It’’s difficult to find animals for recording.
D．It’’s difficult to find mammals for recording.

单项选择题

A．Two nights.B．Two days.C．Four nights.D．Four days.

A．Two nights.
B．Two days.
C．Four nights.
D．Four days.

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