—What happened________him？
—He had an accident．
| A．with | B．to | C．of | D．about |
Health is very _____and every student knows the _____of keeping healthy.
| A．important ; importance | B．important ; important |
| C．importance; importance | D．importance; important |
Our country _______ a lot in the last fifty years.
| A．will change | B．changed |
| C．changes | D．has changed |
She said she had some trouble ___________ her homework.
| A．finish | B．finishing |
| C．to finish | D．Finished |
---Is the notebook Carla’s?---It _____be hers. It has Mary’s name on the cover.
| A．could | B．might | C．must | D．can’t |
---What’s wrong with you, Dave?
---My homework can’t be __________ on time because I’ve left it at home.
| A．given out | B．got over |
| C．showed up | D．handed in |