Section A
21. –My mum isn’t in Shanghai now. She has gone to Paris.
--Oh, can you tell me when she ______?
A. is leaving B. would leave C. has left D. left
22. ---Can I meet you tomorrow afternoon？
---Sorry. I ____ an important guest from America then. Let’s make it another day.
A. am receiving B. will have received C. will be receiving D. will receive
23. If prices rise too high, the government has to do something _________ it.
A. stop B. stopped C. stopping D. to stop
24. A survey of the opinions of experts_____ that three hours of outdoor exercise a week___ good for one’s health.
A．show, are B．shows, is C．show, is D．shows, are
