A. vegetation
B. eliminate
C. disappearance
D. intonation
A. photo
B. rapid
C. pattern
D. about
A. environment
B. understanding
C. population
D. conservation
A. impossibly
B. especially
C. naturally
D. importantly
A. medical
B. pollutant
C. imprison
D. protective
A. must
B. natural
C. hunt
D. fun
A. scientist
B. million
C. police
D. medical
A. sorry
B. monthly
C. sky
D. usually
A. cups
B. photos
C. failures
D. always
A. teach
B. much
C. school
D. choice
A. planted
B. destroyed
C. eliminated
D. worried
A. interest
B. value
C. conserve
D. cost
A. ill
B. sick
C. endangered
D. diseased
A. grass
B. plant
C. tree
D. bush
A. varieties
B. differences
C. changes
D. types
A. was used to be attacked
B. used to be attacked
C. was used for being attacked
D. used to attack
A. at the conference by Dr. Blake at 3 p.m.
B. at the conference at 3 p.m. by Dr. Blake
C. by Dr. Blake at the conference at 3 p.m.
D. at 3 p.m. by Dr. Blake at the conference
A. lie
B. to lie
C. lying
D. has lied
A. bring
B. to bring
C. bringing
D. who brings
A. clean
B. to clean
C. cleaning
D. who cleans
A. national
B. international
C. natural
D. lively
A. lakes
B. stones
C. sand
D. water
A. resources
B. gases
C. fuels
D. plants
A. renewable
B. nonrenewable
C. new
D. modern
A. such
B. such as
C. as
D. like
A. it
B. which
C. that
D. what
A. installed
B. put
C. placed
D. replaced
A. and
B. but
C. or
D. so
A. iron
B. water
C. metal
D. gold
A. in
B. on
C. at
D. by
A. like
B. also
C. and
D. as well as
A. However
B. Nevertheless
C. For example
D. In fact
A. killed
B. protected
C. fed
D. left
A. Because of
B. has been
C. seriously ill
D. can't go
A. Though
B. not good at
C. palying
D. to win
A. is known
B. these questions
C. so difficult
D. can’t answer
A. This water
B. warm enough
C. young boys
D. to swim
A. unless
B. had had
C. enough money
D. would have bought
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