You ______be sitting in this waiting room, sir. You see, it is for women and children only.
| A．oughtn’t to | B．dare not | C．need not | D．will not |
Though they may know their parents are right, teenagers sometimes tend to _____ act against their parents’ wishes because they hope to get away from the control of them.
| A．accidentally | B．typically |
| C．eventually | D．deliberately |
Compared with the generation of our grandparents, who grew up in an age when people were _____ in almost every kind of materials, we should be content with the abundant supply.
| A．lacking | B．curious |
| C．cautious | D．accurate |
To make contributions to the protection of the environment, the company encourages its workforce to make the _______ to alternative means of transportation such as carpooling or biking to reduce air pollution.
| A．switch | B．conclusion |
| C．variety | D．enquiry |
While I admit that English words keep escaping from our memory, constant ______ to them not only increases our understanding of them, but likely plants them into our mind.
| A．pressure | B．exposure |
| C．procedure | D．mixture |
Busy as he is, he ______ a few hours for exercise every day.
| A．sets off | B．sets about |
| C．sets down | D．sets aside |