Some people in Beijing go to work half an hour earlier every day to avoid in the traffic jam
—When did you first meet Tom?—The first day I came to this city,________,on May 2.
Interviews were carried out ________ over the telephone,via e-mail or fax or face to face in four cities including Beijing,Shanghai,Guangzhou and Wuhan.
—I'll try to finish the task ahead of time.—I have to remind you that the work is not ________ easy ________ you imagine.
The salesman showed her several MP3s and she chose ________ one as she didn't want to spend too much money on it.
Security cameras are restricted to ________ spaces,such as hallways and exits.There will be no cameras in classrooms,locker rooms(更衣室)or bathrooms.