单项选择题
A．Write their lab reports. B．Find out Professor Smith's schedule. C．Interview some high school students. D．Finish their chemistry experiment.
A．Employ them as lab assistants. B．Teach classes at their high school. C．Help them with their studies. D．Pay them for participating in the study.
A．A chemistry assignment. B．A study that their chemistry professor did. C．A class that the woman is taking. D．A job possibility.