We should never ______ ourselves with book knowledge only.
| A．content | B．contract | C．contrast | D．Contain |
A good teacher should encourage his students to __________ the knowledge by themselves instead of just copying and memorizing what the teacher said in class.
| A．expand | B．observe |
| C．digest | D．react |
—Could I ask you a rather personal question?
—Sure, __________.
| A．pardon me | B．go ahead |
| C．good idea | D．forget it |
People try to avoid public transportation delays by using their own cars, and this __________ creates further problems.
| A．in short | B．in case |
| C．in doubt | D．in turn |
The __________ look on his face showed that he hadn't expected it.
| A．astonished | B．astonishing |
| C．being astonished | D．having astonished |
You didn't use to like him much when we were at school, __________?
| A．were we | B．weren't we |
| C．did you | D．didn't you |