One day Mr. and Mrs. White went shopping by car. They stopped their car near a shop. They bought（买）a lot of things and they wanted to put the things into the car. But Mr. White couldn't open the door of the car, so they asked a policeman to help them. The policeman was very friendly. He started to open the car for them. Just then a man came up and shouted（喊）, “What are you doing with my car?” Mr. and Mrs. White had a look at the car's number and they were frozen（惊呆了）there. It wasn't their car.

    There are forty students in our class. There are ten boys. There are thirty girls

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