At the routine office meeting, the headmaster insisted that the problems _______ paid special attention to.
| A．referred to being | B．referred to be | C．refer to being | D．refer to be |
—I failed again. I wish I _________ harder.—But you _________.
| A．had worked； hadn’t | B．worked； don’t |
| C．had worked； didn’t | D．worked； didn’t |
The headmaster hurried to the concert hall only _________ the speaker
| A．to find； left | B．to find； gone |
| C．finding； left | D．finding； gone |
The engineer ______my father works is about 50 years old.
| A．to whom | B．on whom | C．with which | D．with whom |
They arrived at a farmhouse, in front of ______sat a small boy.
| A．whom | B．who | C．which | D．that |
The pen ______he is writing is mine.
| A．with which | B．in which | C．on which | D．by which |