单项选择题
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.
A．She doesn't want to pay the late fee. B．She was given incorrect information. C．She can't afford to pay her tuition. D．She didn't pass her mathematics class last semester.