A. pollution
B. polluted
C. pollute
D. pollutant
A. whom
B. when
C. where
D. which
A. Although
B. So
C. Therefore
D. However
A. will be - travel
B. am - will travel
C. were - would travel
D. would be – traveled
A. had stayed
B. was staying
C. stay
D. could stay
A. don’t you
B. are you
C. do you
D. did you
A. uses to go
B. has gone
C. used to go
D. was going
A. is built
B. was building
C. was built
D. has been built
A. in
B. on
C. at
D. to
A. That’s a fine day
B. That’s a good idea
C. That’s a reason
D. That’s a good trip
A. A week
B. A few weeks
C. A month
D. A few months
A. The writer
B. The writer and his friend
C. The writer's family
D. The writer's friend
A. It was bad
B. It was rainy
C. It was snowy
D. It was nice
A. By car
B. By train
C. By bus
D. By air
A. At 8 o'clock
B. At 12 o'clock
C. At 4 p.m
D. At 9 p.m
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