We ______ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
Try on both shoes and walk around to ensure a comfortable fit ___ you know your shoe size.
| A．as if |
| B．unless |
| C．even if |
| D．now that |
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 |
Though told to stop, the excited speaker ___ talking.
| A．tried on |
| B．kept up |
| C．kept on |
| D．went up |