Professor Tu Youyou never stops doing research on Chinese medicine, ______?
A. is she B. does she C. isn’t she D. doesn’t she
The two companies decided to work together ______ they had common interest.
A. because B. unless C. but D. or
–______ I park my car here for a while?
–No, you mustn’t. Do you see the sign “NO PARKING”?
A. Would B. May C. Must D. Should
The workers are busy _______ windows to the new building these days.
A. fix B. fixed C. fixing D. to fix
Vivian refuses ______ her children to the weekend training centre for extra classes.
A. to send B. sending C. sent D. sends
The museum _____ next month to celebrate the Science & Technology Festival.
A. is decorated B. will decorate C. is decorating D. will be decorated
