—Catherine, I have cleaned the room for you.
—Thanks. You_______ it. I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
There are some tall trees in our campus, some ________ more than forty meters.
| A．measure | B．measured |
| C．measuring | D．to measure |
People believe that the China Dream is not very difficult ________ so long as the whole nation works hard for it.
| A．realizing | B．to be realizing |
| C．realized | D．to realize |
These diagrams are especially helpful when we have a concrete problem ________ at hand.
| A．be solved | B．to solve |
| C．solved | D．being solved |
At last, we found ourselves at the foot of a hill with trees providing shade and ________ down to eat our picnic lunch.
| A．sitting | B．having sat |
| C．to sit | D．sat |
Launched in March 2010, China Face has been a daily news feature ________ on a Chinese individual.
| A．being focused | B．focusing |
| C．to be focused | D．to focus |