Choose A, B, C, D for each gap in the following sentences. 1. Emergency teams are still clearing up the __________ from the plane crash. A.debris B.dust C.piece D.waste 2. Thousands of buildings and houses were completely destroyed when the earthquake __________ the city. A. fought B. struck C. happened D. arrived 3. The Maori in New Zealand greet each other by __________ their noses. A.punching B.touching C.blowing D.shaking 4 .If you __________ the president, what would you do to help the environment ? A.are B.had been C.were D.was 5. Singapore is famous for its __________ and green trees. A. cleanliness B. cleanly C. cleaning D. clean 6. Air___________, together with littering, is causing many problems in our cities today. A. pollute B. pollution C. polluting D. polluted 7. If we ______________ water carefully, more people will have fresh water. A. will use B. would use C. using D. use 8. A severe tropical___________ is called a typhoon. A. drought B. rain C. flood D. storm