Unit 3  The Earth单元综合检测题
                    (时间：60分钟；满分：100分)
 
一.单项选择（每小题1分，共10分）
1. Benny saw three ______ climbing the walls.
  A. thiefs       B. thief      C. thieves       D. thieve
2. -Tom, what are those?
  -They are________.
  A. deers       B. a deer      C. deer       D. deeres
3. There ____ a book and two pens on the desk.
  A. is         B. are       C. be       D. /
4. The boy is thirsty, and he would like _______.
　A. a cup of tea            B. a bowl of rice
  C. a box of chocolate         D. a piece of bread
5. Maths _____ my favourite subject.
  A. is          B. am       C. are       D. be
6. It's important _______ us to study hard.
　A. to       B. for      C. on       D. with
7. There are many animals on Earth. Some live _____ the land. Some live ____ the water.  
  A. under; on      B. in; under     C. on; under      D. under; in
8. We must stop _____ the animals!
  A. kill       B. to kill   C. killed      D. killing
9. Don't ____ rubbish i