The air in mountain areas is ____ that in big cities.
| A．as fresh as | B．fresher than | C．as dirty as | D．dirtier than |
Children who are not active or_____ diet is high in fat will gain weight quickly.
| A．what | B．whose |
| C．which | D．that |
For many cities in the world, there is no room to spread out further, _____ New York is an example.
| A．for which | B．in which |
| C．of which | D．from which |
---Why don’t we choose that road to save time?
--- The bridge to it_____.
| A．has repaired | B．is repaired |
| C．is being repaired | D．will be repaired |
In the last few years, thousands of films_____ all over the world.
| A．have produced | B．have been produced |
| C．are producing | D．are being produced |
English is considered as a(n) _____ language, and it is no surprise that there are so many people in the world learning English.
| A．universal | B．logical |
| C．artificial | D．regular |