The teacher's efforts ______ when one of his students was admitted to Beijing University.
| A．paid back | B．paid off | C．paid for | D．paid out |
We can overcome all the difficulties ___ we are closely united.
| A．even if |
| B．as long as |
| C．rather than |
| D．as soon as |
I can’t ___ the loud music. It is driving me mad.
| A．put up with |
| B．come up with |
| C．catch up with |
| D．keep up with |
The engineers are so busy that they have zero time for outdoor sports activities, ___ they have the interest.
| A．wherever |
| B．whenever |
| C．even if |
| D．as if |
This restaurant has become popular for its wide ___ of foods that suits all tastes and pockets.
| A．division |
| B．area |
| C．range |
| D．circle |
Teachers have to constantly update their knowledge in order to maintain their professional ___.
| A．consequence |
| B．independence |
| C．competence |
| D．intelligence |