—That must be a mistake.
—No, it _____ a mistake.
| A．mustnotbe | B．needn’tbe | C．cannotbe | D．wouldnotbe |
They wanted to charge $5,000 for the car, ________we managed to bring the price down.
| A．but | B．so | C．when | D．since |
Find ways to praise your children often，________ you'll find they will open their hearts to you.(2011·山东)
| A．till | B．or | C．and | D．but |
Sometimes proper answers are not far to seek ________ food safety problems.
| A．in | B．to | C．on | D．after |
He was a good student and scored ________ average in most subjects.
| A．below | B．of | C．on | D．above |
I would like a job which pays more，but ________ I enjoy the work I'm doing at the moment.
| A．in other words | B．on the other hand |
| C．for one thing | D．as a matter of fact |