--I've been waiting for the phone from my uncle since 5 o'clock.
--________. He is not only a skillful driver but he also knows the road very well.
| A．How long has he been away? |
| B．What's the matter with him? |
| C．I don't think you should worry about him. |
| D．I'm afraid there's something wrong with the telephone. |
Students are warned ________ in the exam, otherwise they will be severely punished.
| A．to not cheat | B．not cheating |
| C．not be cheated | D．not to cheat |
I am wondering ________ you have read “the Harry Potter series” written by JK Rowing.
| A．when | B．whether |
| C．where | D．what |
It is better for you to walk down the stairs instead of ________ the elevator.
| A．taking | B．to take |
| C．take | D．taken |
He told us that he was tired and thirsty because he ________ in the desert for days.
| A．walked | B．has walked |
| C．had walked | D．would walk |
My mother ________ as an architect since she graduated from Tongji University.
| A．worked | B．has worked |
| C．had worked | D．is working |