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1.In big cities,the streets are usually very busy.So you can

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1.In big cities,the streets are usually very busy.So you can f____ trains under the ground or on a rail above the streets.They carry people q____ in and out of the city.
Can a train run over water?Yes,it can.There are many b____ over the rivers.The trains can easoily run over the water .There also many tunnels u____ rivers.The trains can go through the tunnels swiftly.But it is not easy to b____ the bridgesor make the tunnels.Would you like to take a maglev train tin Pudong,Shanghai?It can speed un tp 431 km per hour.It is the ____ train in China.
1.In big cities,the streets are usually very busy.So you can
find,quickly,boats,under,build,first maglev
Big cities are usually c_______ in the main streets.There ar People 1.—— in a big cities are often very busy and have to Cars aren't easy to p_______ in busy streets in big cities. 英语翻译The roads in our city are usually very busy.There are a The air in big cities ______ very dirty by factories. cities will be very big and crowded in the future对very big a In big cities,you can find＿＿＿（weat）people＿＿＿（walk) in the st 纠结当中...（ ）In___cities,the streets and roads are usually very there are many busy streets in shanghai .during the holi the You can find few people in the streets,____ ____? There is a very big tree in front of my house,so you are sur 几道英语题1 The cars are moving _____(slow) in these busy streets