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5. The more we control pollution, ... the environment is.
a. more clean
b. the cleaner
c. cleaner
d. the cleanest
6. Schoolboys don’t smoke in the classroom, ...?
a do they
b. don’t they
c smoke they
d. aren’t they
7. Is that the spot ... you had the accident?
a. which
b. why
c. whom
d. where
8. ... a lot of work to do tomorrow.
a. Will be
b. There will be
c. It will be
d. Where will