Lesson 3:
Choose the best answer to complete each sentence
1. The air in big cities is usually polluted because there ……………… too many cars.
A. be              B. are            C. is
2. Could you suggest some ways to ……………….. overpopulation and pollution in the world?
A. reduce         B. save          C. decline
3. We sent some gloves and scarves to children in cold countries, ……………….. they could keep themselves warm.
A. so           B. because             C. but
4. We need ………………… more money to help more people.
A. raised          B. to raise          C. raising
5. Vacations in the future will be very different …………. now.
A. from           B. with               C. over
6. This car model can reach of ……………. 200 km/h.
A. journeys             B. distances               C. speeds
7. People should use ……………… energy to help save the environment.
A more              B. most                     C. less
8. My dad usually ………………… newspapers by using them to wrap things.
A. switches            B. recycles            C. limits
9. Hong Kong has a big traffic problem which can ……………..
A. solve           B. solved             C. be solved
10. Last summer my parents me ………………. a new bike.
A. bought                B. buy                 C. buys