新概念1B综合训练一、单项选择1、_ is the postman? He is at the door.A、Where B、Which . C、Who D、What2、_ your father?He is a doctor.A、How is B、Who is C、Which is D、How about3、_? - Roberts new jeans are green.A、What color is his jeans? B、What color are his jeans? C、Which one is Roberts jeans? D、Which ones are Roberts jeans? 4、Is your hat dirty? - _.A、Yes, it is not. B、No, it is. C、Yes, there is, D、No ,it is not.5、What color ar