题目

 圆的圆心坐标是  A.                                 B.        C.                                  D.  答案：D　　用适当的词完成下列会话 　　A: (1)________ do you work? 　　B: In a police station. 　　A: (2)________ do you do? 　　B: I'm a police officer. 　　A: (3)________ you (4)________ your work? 　　B: Yes, I like it. 　　A: (5)________ your work interesting? 　　B: Yes, but (6)________ (7)________ dangerous. 　　A: (8)________thieves like you? 　　B: (9)________ ,they (10)________.