We don't know if there is a limit　_________

1It is more difficult for today's athletes　__________
F..
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2If you are in the street when an earthquake occurs, stay in a large open space
A.Right
B.Wrong
C.Not mentioned
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3The best way to leave the building during an earthquake is to get into a lift
A.Right
B.Wrong
C.Not mentioned
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4If you are at home when an earthquake occurs, stand near a big table
A.Right
B.Wrong
C.Not mentioned
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5Students should go to the school playground or an open space once the tremors stop.
A.Right
B.Wrong
C.Not mentioned
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6Research has helped coaches　__________
F..
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7Which of the following is NOT true of the Japanese、
A.They live in a crowded country.
B.They have recycled all their waste.
C.They are very good at recycling.
D.They have to share their limited space with rubbish
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8How much waste did the US recycle in 1996、
A.1.3 million tons.
B.27 million tons.
C.57 million tons.
D.53 million tons.
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9Where can people get a big prize for contributing to recycling、
A.Rockford.
B.Tokyo.
C.Hong Kong.
D.London.
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10In Japan, the newspapers collected by children
A.are given to poor people.
B.are used as reading materials.
C.are used as prizes.
D.are recycled.
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We don't know if there is a limit __________