II. Choose the best answer A, B, C or D to complete the following sentences 1. Air __________ is causing many environmental problems in our cities today. A. pollute     B. pollution             C. polluting             D. polluted 2. If you can speak English, you __________ able to go to Canada. A. will be      B. will          C. were                   D. are 3.The road in front of my office is always __________ when it rains heavily. A. to flood              B. flooding              C. flood                  D. flooded 4. Singapore is famous for its __________ and green trees. A. cleanliness                   B. cleanly               C. cleaning             D. clean 5. After I __________ in the room, she left. A. come        B. had come  C. came                  D. will come 6. This is one of the worst volcanic __________ in this year. A. eruption             B. erupt                  C. erupting              D. eruptive 7. The roof of the building __________ in a storm a few days ago. A. damaged            B. was damaged                C. has damaged                 D. has been damaged 8. In some English speaking countries, turkey is __________food at Christmas. A. national              B. historical            C. traditional           D. possible