A. Either
B. nor
C. is
D. his work
A. was
B. that
C. had talked
D. a lot
A. added to
B. gave up
C. participated in
D. got rid of
A. large quantity
B. small quantity
C. excess
D. sufficiency
A. similar
B. different
C. fake
D. Genuine
A. Can you help me
B. what happens
C. help me
D. What can I help you?
A. I'm not thirsty. Thank you.
B. No, I won't.
C. Not at all
D. Yes, I will.
A. is entering
B. enter
C. to be entered
D. entering
A. astronaut
B. engineer
C. scientist
D. technical
A. wasn't able to
B. isn't able to
C. can
D. could
A. population explosion
B. safe water shortage
C. industrial pollution
D. acid rain
A. The government did not have the power to enforce laws and regulations.
B. It has 1,300 rare species that do not exist anywhere else in the world.
C. It contains a rich variety of animals and plants.
D. It is polluted by massive volumes of industrial wastes discharged into it.
A. We should do something protect our water resources.
B. We should encourage people to use safe water.
C. We should use a lot of clean water.
D. We should limit the clean water in the world.
A. exactly 15
B. less than 15
C. nearly 16
D. exactly 16
A. industrial pollution
B. acid rain, industrial pollution and garbage
C. garbage
D. acid rain
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