There are all kinds of trains in the world. There are trains to carry people, animals"and"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 high above the streets. They carry people in"and"out of the city.

    Can a train run over water? Yes, it can. There are many bridges over the river. The trains can easily run over the water. But it is not easy to build bridges. Today’s trains have dining cars for people. You may eat something on the way if you’re hungry.

    Trains are useful for men, women,"and"children. Many children have toy trains. With the toy trains they can enjoy the wonderful world of trains.