I would appreciate it________you call back this afternoon for the doctor's appointment.
| A．until |
| B．if |
| C．when |
| D．that |
The Olympic Games are held _____.
| A．for four years | B．each four year |
| C．every four years | D．every fourth year |
This area experienced ____ heaviest rainfall in ____ month of May.
| A．/ ; a | B．a; the | C．the ; a | D．the ;the |
We offered these students a summer course ,aimed _____ improving their spoken English.
| A．to | B．of | C．at | D．for |
--I can't find John .Where did you meet him this morning?
-- It was in the hotel _____ he stayed．
| A．why | B．where | C．which | D．What |
Don’t ____ when other people are talking.
| A．cut through | B．cut across | C．cut into | D．cut in |