单项选择题
A.There aren't enough cabinets. B.There is too much noise. C.Office supplies are taking up space. D.some teaching assistants don't have desks.
A.She wants to quit her job in the chemistry lab. B.She wants to get practical experience. C.She's interested in becoming a psychology major. D.She wants to earn extra money.
A.Write their lab reports. B.Find out Professor Smith's schedule. C.Interview some high school students. D.Finish their chemistry experiment.