單項(xiàng)選擇題In some parks visitors are requested to keep（）the grass.
A.aside
B.away
C.out
D.off
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1.單項(xiàng)選擇題In order to（）your goals, you must work hard.
A.make
B.achieve
C.require
D.develop
2.單項(xiàng)選擇題In order to（）the disease, the first thing we should do is to do research about it and find out a satisfactory cure.
A.confirm
B.conduct
C.control
D.confuse
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Man was, is and always will be trying to improve his living conditions.
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The author"s attitude towards gift giving is （）.
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Which of the following is the author"s suggestion
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There is nothing so admirable as a man whose sacrifices his life and happiness for others.
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What effect has the Internet had on music piracy
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