Many people agree that ______ knowledge of English is a must in _______ international trade today.
| A．the, an | B．a, 不填 | C．the, the | D．不填, the |
During the period of recent terrorist activities, people _____ not to touch an unattended bag．
| A．had always been warned | B．were always being warned |
| C．are always warning | D．always warned |
—What a great cook your sister is!
—Yeah! We ______ never have enough of her cookies．
| A．may | B．must | C．should | D．can |
It is difficult to find a satisfying job today．This job is great ________ salary, but it has some disadvantages．
| A．in terms of | B．in case of | C．in favor of | D．on top of |
Some old people don’t like pop songs because they can’t _____so much noise
| A．concern | B．tolerate | C．undertake | D．ignore |
I spent several years in France, ______ I never learnt to speak French．
| A．for | B．yet | C．or | D．where |