Laura’s knee pain ______ from such activities as running, hiking and horse riding.
| A．puts her up | B．holds her back |
| C．takes her off | D．gives her away |
__________ twice a year is the rule that every driver shall obey in this city.
| A．Being examined | B．Examined |
| C．To examine | D．Having examined |
Playing on the football pitch __________.
| A．some students are with their P. E. teacher |
| B．their P. E. teacher is with some students |
| C．some students with their P. E. teacher are |
| D．are some students with their P. E. teacher |
With the development of the Internet, e-mail has largely __________ the traditional business letter.
| A．exchanged | B．reduced |
| C．replaced | D．traded |
I won't buy this iPhone unless the price __________ to under 2，000 yuan.
| A．reduces | B．will be reduced |
| C．has reduced | D．is reduced |
Since we have made __________，we have to make __________ to achieve more.
| A．a progress; efforts | B．progresses; an effort |
| C．much progress; effort | D．little progress; efforts |