单项选择题
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A.He wanted to work with his friend.
B.He enjoyed traveling around the world.
C.He wanted to go to Spain.
D.He was rejected by the engineering firm.
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单项选择题
We may infer that iodine, fluoride and calcium are______.
A.substances which act positively or negatively on man’’s health
B.harmful substances in the water supply
C.substances which help provide breeding places for pests
D.substances contributory to good health
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单项选择题
A.She is a fast runner.B.She runs slowly.C.She runs too quickly.D.She is too weak to run.
A.She is a fast runner.
B.She runs slowly.
C.She runs too quickly.
D.She is too weak to run.
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