题目

阅读下列材料，从A、B、C、D四个选项中选出最佳答案。 What is a Chinatown? Is it a town in China?Of course not! It is a place where many overseas(海外) Chineselive together, usually outside China. Chinatown is around the world. Thebiggest one is in New York, America. It is a good place to go. Shopping:Shopping in New York Chinatown is fun. You can find lots of things there.Most of them are made in China. Mott Street is the best place to shop becausethings there aren't very expensive. Eating:It has more than 200 restaurants. You can enjoy traditional(传统的) Chinese foo　　要使一个平行四边形成为正方形，则需增加的条件是________(填上一个正确的结论即可)．