---How much difficulty did you have________________ this problem?
---_____________. It's quite easy.
| A．to solve, Nothing | B．solving; None | C．to solve, None | D．solving; Nothing |
—Could you turn the TV down a little bit?
—Is it disturbing you?
| A．Take it easy. | B．I’m sorry. |
| C．Not at all. | D．I don’t know. |
—Where’s that report, Daniel?
—I brought it to you you were in Mr. Black’s office yesterday.
| A．if | B．when |
| C．because | D．before |
In crowded places like airports and railway stations, you take care of your luggage.
| A．can | B．may | C．must | D．will |
—Did Alan see his old friends yesterday?
—Yes, he did. He his old friends for several years.
| A．didn’t see | B．wouldn’t see |
| C．hasn’t seen | D．hadn’t seen |
—It is selfless the doctor to devote all the time he had to caring for the patients.
—I think so, they are so great.
| A．for | B．of | C．with | D．to |