____________ cease（终止） advertising, prices would be significantly reduced.
| A．Were they to | B．Could they |
| C．If they | D．Would they |
As soon as the manager enterd his office, he began to ______the telephone.
A.look up B. look upon C. look through D look for
The little girl couldn’t work the problem out. She wasn’t _____clever.
| A．that | B．much | C．many | D．too |
A computer cannot remember who_____; it simply does what _________.
| A．will use it; it is told | B．uses it; it has told |
| C．used it; it is told | D．has used it; it told |
The famous scientist was going out _____ he found himself surrounded by lots of young people.
| A．when | B．before | C．while | D．after |
– Look! What are those boys doing ______ the table?
---Well, they are playing cards.
| A．on | B．around | C．under | D．beside |