Keys _______ opening the lock in the door.
| A．used for | B．are used | C．are used to | D．are used for |
Our Maths teacher. Mr Wang dovoted his free time to _______ Maths.
| A．teach our | B．teaching our |
| C．teach us | D．teaching us |
.At last he had no choice but _____ the job.
| A．take | B．to take |
| C．taking | D．took |
I’d rather TV at home thanshopping with you．
| A．watch; go | B．watch; going |
| C．watching; going | D．watching; go |
—I find it's difficult to decide what to wear.
—Try red clothes．They can makeeasier to take action.
| A．that | B．it | C．this | D．what |
—It’s meaningful us to do something for people in need.
—It’s really nice you to think so.
| A．for; of | B．of ; for |
| C．for; for | D．of; of |