卷首语：亲爱的同学们，第一学期即将过去，在这里为期末考试练练兵，京翰教育预祝你期末考个好成绩！
UNIT3练习题
一、用所给词的适当形式填空。
1.Kangaroos are ______ (play) and chimpanzees are _____ (noise).
2. I was __ (surprise) to find hardly anyone in the zoo.
3. Visiting zoos are like ___ (live) textbooks for young people.
4. He ____ (use) to be ____ (call) “Little Tiger”.