Try not to cough more than you can _______ since it may cause problems to your lungs.
| A．check | B．allow | C．stop | D．help |
Many experts hold the view teacher’s development is the key to better education lies.
| A．which; where | B．which; which |
| C．that; where | D．that; in which |
Mr. Smith has three children, the youngest of them music at college.
| A．studying | B．is studying |
| C．studies | D．studied |
Generally speaking, the window seat is usually the first one .
| A．to take | B．taken | C．to be taken | D．taking |
Clive moved to London, Edward to run the office in Manchester.
| A．left | B．being left |
| C．to leave | D．leaving |
Most countries of the world have records of the great natural catastrophes thatbefore.
| A．had occurred | B．have occurred |
| C．occurs | D．would occur |