A. used
B. arrived
C. closed
D. liked
A. internet
B. bucket
C. invent
D. spend
A. check
B. watch
C. chemistry
D. latch
A. teach
B. jeans
C. clean
D. instead
A. rice
B. pipe
C. fill
D. appliance
A. Will be available to everyone
B. Is not expensive
C. Will be limited to the very wealthy
D. Will be limited to the very poor
A. Experience space sickness
B. Not need space suits
C. Will get a sunburn
D. Make side trips to Mars
A. Astronauts want to make a lot of money
B. Astronaut food is very expensive
C. Space equipment and fuel is expensive
D. There are high taxes on space travel
A. Their spacesuits are too thin to protect them.
B. They lack protection provided by Earth’s atmosphere.
C. They stay in the space for such a long time.
D. They float around inside the craft and have space sickness.
A. to discover
B. for discovering
C. discovering
D. to be discovering
A. would be
B. should be
C. would
D. should
A. win
B. won
C. had won
D. will win
A. was polluted
B. be polluted
C. is polluted
D. has polluted
A. drives
B. drove
C. had driven
D. was driving
A. sleep
B. had slept
C. was sleeping
D. slept
A. say
B. said
C. would say
D. would have said
A. smoke
B. smoked
C. would smoke
D. had smoked
A. won’t be
B. wouldn’t be
C. won’t have been
D. wouldn’t have been
A. know
B. would known
C. knew
D. had known
A. spend
B. spent
C. to spend
D. spending
A. be
B. is
C. was
D. had been
A. watch
B. watches
C. watched
D. watching
A. but
B. however
C. moreover
D. and
A. because of
B. because
C. but
D. and
A. Because of
B. In spite of
C. Although
D. Because
A. more beautiful
B. beautifuler
C. beautiful
D. as beautiful
A. in
B. on
C. of
D. for
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