The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.
| A．why | B．which | C．when | D．where |
—Why not go out for a walk before breakfast?
—Oh，yes. _________ is my favorite time of day.
| A．In the early morning | B．Early morning |
| C．The early of morning | D．The early morning that |
—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 |