新概念Lesson1-9 练习题一、 基础选择1、_am a student , and _ sister is a nurse . A I/I B Me/my C I/my D My/I2、Carol and I _ students ,and _parents are doctors . A are /we B are /our C am /my D is / her3、Is this your pencil ? _. A Yes , this is B Yes , it is C No , it isnt my D Yes , it i