6. If you ________ the president, what would you do to help the environment? A. would be B. are C. had been D. were 7.

6. If you ________ the president, what would you do to help the environment?
A. would be B. are C. had been D. were
7. Don’t drink that water. It’s ________.
A. contaminated B. pure C. damaged D. dumped
8. If he ________ trash around his garden, the garden would look very nice now.
A. will throw B. would throw C. didn’t throw D. doesn’t throw
9. Since 1965, the maple tree with red leaves ________ the most well-known Canadian symbol.
A. has become B. become C. became D. becoming
10. We ________ him since last Saturday.
A. haven’t seen B. don’t see C. didn’t see D. don’t have seen
11. Do you know that the telephone, the TV and penicillin are Scottish ________?
A. inventors B. inventor C. inventions D. invention
12. The Louvre Museum ________ from 9 a.m. to 6 p.m. every day except Tuesday and Wednesday.
A. opens B. open C. will open D. will be open
13. If I ________ you, I ________ water from that dirty tap.
A. am – will drink B. am – won’t drink
C. were – would drink D. were – wouldn’t drink
14. I ________ Sydney Harbour twice, so this time I think I ________ to a different place.
A. have visited – will go B. have visited – will be going
C. visited – will go D. visited – will be going
15. A lot of fish has died recently because of the ________ water in this lake.
A. contaminating B. contaminated C. contaminate D. contaminant