导读：同学们在做阅读理解练习的时要学会运用一定的解题技巧，如运用构词法、语境线索等帮助来推测关键词义。在阅读文章的过程中，常常会遇到一些生词，如果不懂得这些词义就会妨碍理解，但大部分生词的词义是可以根据上下文，结合构词法、借助文章中的语境线索帮助在理解基础上猜测其词义，这有助于加快阅读速度，提高阅读理解能力。下面是五年级阅读理解及参考答案：trains，供同学们思考练习。

　　There are all kinds of trains in the world.There are trains to carry people,trains to carry animals and trains to carry things. There are fast trains and slow trains.Some trains go under the ground and some trains go through hills. In big cities,the streets are usually very busy. So you can find trains under the ground and trains on a rail above the streets. They carry people in and out of the city. Can a train run over water? Yes,it can.There are many beidges over the river.The trains can easily run over the water.But it is noteasy to build bridges. Today's trains have diningrooms for people. You may eat something on the way if you are hungry. Trains are useful to men,women andchildren.Many chidren havemodle trains. With the modle trains they can build their own rails enjoy the wonderful world of trains.

　　题目：

　　( )1.There are _____kinds of trains in the world. A.a few B.many C.some D.little

　　( )2.Usually people like taking_____. A.fast trains B.slow trains C.trains to carry people D.trains to carry animals

　　( )3.In_____cities,the streets are usually busy. A.small B.middle C.large D.tiny

　　( )4.The underground trains carry people_____. A.in and out of big cities B.from big cities to small towns C.from small towns to big cities D.in and out of countries

　　( )5.Many children can enjoy the wonderful world of trains because they_____. A.have real trains B.have modle trains C.often take trains D.have real rails

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