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 |
While intelligent people can often simplify the complex, a fool is more _________ to complicate the simple.
| A．possible | B．probable |
| C．likely | D．Certainly |
When I _________ the past and think how much time has been wasted, my heart bleeds.
| A．look back at | B．look forward to |
| C．look out of | D．look away from |
It was not until his father came back from work _________ the boy began to do his homework.
| A．when | B．which |
| C．that | D．Where |
—When shall we meet again?—Any time that _________ you best.
| A．fits | B．aggress |
| C．matches | D．suits |
—Can Bob help me with this problem?—I’m afraid it's beyond his _________.
| A．strength | B．ability |
| C．energy | D．Force |