_______ is important for us to learn English well.
| A．What | B．That | C．It | D．Which |
_____ of water makes Death Valley a desert, but it is by no means devoid.
| A．Lacking | B．Being lack | C．Because of lack | D．Lack |
There are some police cars in front. What do you suppose _____?
| A．is the matter | B．is happened | C．is the wrong | D．the trouble is |
The great use of school education is not so much to teach you things ____ to teach you the art of learning.
| A．as | B．that | C．than | D．but |
Modern science and technology has _____ communication between people far apart.
| A．made convenient | B．made it convenient | C．made it convenient for | D．made it convenient to |
It _____ quite a few years _____ the accused was declared innocent and set free.
| A．was; since | B．is; that | C．will be; when | D．was; before |