A. spread
B. bread
C. break
D. breath
A. change
B. machine
C. computer
D. chemistry
A. glanced
B. provided
C. brushed
D. looked
A. represent
B. constancy
C. participate
D. literacy
A. learn
B. to learn
C. learning
D. having learnt
A. best friends
B. neighbors
C. acquaintances
D. partners
A. traditional
B. longevity
C. similarity
D. literacy
A. to take
B. taking
C. than take
D. to taking
A. free
B. voluntary
C. charitable
D. donated
A. turned over
B. put up
C. carried out
D. set in
A. accomplishes
B. accomplished
C. has accomplished
D. will be accomplished
A. is she
B. isn't she
C. are they
D. aren't they
A. to go
B. be going
C. have gone
D. went
A. telling
B. being told
C. to tell
D. to be told
A. meet
B. met
C. have met
D. had met
A. had seen
B. has seen
C. saw
D. would see
A. calm
B. calmly
C. calming
D. calmed
A. If only
B. Because
C. Unless
D. Provided
A. greatly
B. densely
C. closely
D. variously
A. Modernization
B. Literacy
C. Pollution
D. Overpopulation
A. On
B. In
C. At
D. For
A. need be doing
B. need to be done
C. need being done
D. need to do
A. would feel
B. would have felt
C. will feel
D. will have felt
A. graduated
B. was graduating
C. has graduated
D. had graduated
A. on account of
B. because of
C. in spite of
D. Although
A. hard
B. would be
C. in
D. anything that
A. help
B. both
C. to reach
D. learning potential
A. Any
B. travel
C. in
D. carriages of
A. in the history
B. there have
C. more people
D. living
A. increasing
B. of
C. works
D. as
A. has stopped growing
B. is still growing
C. is decreasing rapidly
D. stands at about eight billion
A. can cultivate on all land
B. are not influenced by the land reduction
C. can grow crops on bare rock
D. should protect land
A. hard
B. empty
C. treeless
D. rough
A. Most of the world's land are uncultivated.
B. The rapid growth of population may lead to a shortage of land.
C. Only one fifth of the world's land is being cultivated.
D. There has been a dramatic reduction of the birth rate.
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