Now the air in our city is ______ than it used to be. Something must be done to stop it.
| A．good | B．bad | C．worse | D．better |
Beijing is one of thein the world today.
| A．busiest city | B．busiest cities |
| C．busy city | D．busy cities |
____ do you go to the movies ,Jack? Twice a month.
| A．How soon | B．How far |
| C．How often | D．How long |
_____ the students in our class did’t go to see the film last night.
| A．Ten percent | B．Ten of percent |
| C．Ten percent of | D．Ten percents |
My friend did’t go to the park ____ the rain.
| A．because | B．for |
| C．because of | D．as |
Long time ____ see.
| A．not | B．no | C．did’t | D．don’t |