用方框中所给单词的适当形式填空。(每小题1分,共5分)
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pour seem large rapid pollute |
1.It ____________ that their living conditions were not very good.
2.In the past twenty years, my hometown has
developed
____________.
3.Our government has taken action to make the ____________ river clear again.
4.There are several small chemical factories ____________ waste water into the river.
5.At that time, China was the country with the ____________ population in the world.
用方框中所给的单词的适当形式填空,使短文正确、通顺。每词限用一次。
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seat hold start arrive old hurry travel crowd provide comfort |
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Many large cities have a subway system. The subway is called tube in London. In San Francisco, it is called BART (Bay Area Rapid Transit). Some subway systems, like Chicago’s, are quite 1.____________. It opened in 1897. Others are more recent (近代的). For example, Mexico City’s subway 2.____________ in 1969.
Most subways are very modern and clean, but sometimes they get very3.____________. So people have to follow certain rules to make the trip more 4.____________. In London, when people use the tube, they must stand on the right so that people in a 5.____________ can walk on the left. They let passengers get off the train before others get on, and people are expected to give their 6.____________ to the old and disabled people.
Some subways 7.____________ excellent services. In most subways, there is a station about every one kilometer. Trains 8.____________ at a station about every two minutes. Subways carry a lot of passengers. The number of people 9.____________ one way each hour in London can be about 30,000. However, in some other cities it is much higher. Hong Kong’s subway10.____________ the record of about 80,000 passengers an hour!