1. ______ ari is one of the many problems we have to solve

A. Pure B. Polluted C. Dust D. Pleasant

2. I'll be in trouble if I ______ my passport.

A. lose B. will lose C. lost D. would lose

3. We can eat at home or, ________ you prefer, we can go to a restaurant.

A. when B. whether C. if D. which4. If it is raining this evening, I_________.A. will go out B. don’t go out C. go out D. won’t go out5. Minh’s English is excellent. He speaks________.A. perfectly English B. English perfectlyC. perfect English D.English perfect6. I’m disappointed _________ people have spoiled this area.A that B. when C. if D. how7. He ________ to find a job but he had no luck.A. hardly tried B. hard tried C. tried hardly D. tried hard8. We couldn’t go on a picnic as planned __________ it was raining.A. however B. but C. because D. so9. If he ________ hard today, can he have a holiday tomorrow?A. works B. will work C. worked D. would work10. ________we were tired, we sat down beside the stream.A. Because of B. If C. As D. And11. He _________to find a job, but he had no luck.A. tried hard B. hardly tried C. tried hardly D. try hardly12. Solar energy doesn’t cause __________.A. pollution B. polluted C. pollute D. pollutant13. Are you lookingh forward ___________ my letter ?A. to see B. to seeing C. saw D. seeing