At present，there is little doubt ________ short message plays an increasingly important role in our lives．
| A．whether | B．if | C．that | D．which |
Did John ____ the general cleaning yesterday afternoon?
| A．join | B．attend | C．take | D．take part in |
To enjoy the scenery, Irene would rather spend long hours on the train ___travel by air.
| A．as | B．to | C．than | D．while |
For some students, the computer serves only _____ a tool that is used to play games.
| A．of | B．in | C．as | D．to |
The little boy was the only one who _____ the earth- -quake in his village, and the government sent him to a city school after that.
| A．experienced | B．escaped | C．survived | D．suffered |
The parents are _____ their son who has been away from home for days.
| A．in search of | B．to search | C．searching | D．searched for |