IV. 介词填空:( 10% ) 1. You are 20 years old. Stop acting ______ a kid. 2. When the teacher began to speak, all of the students turned their eyes _____ her and stopped talking. 3. Many agers are fond ____ doing homework and listening to music _____ the same time. 4. Please stop shouting _____ me! I am not a child now. Let’s talk. 5. Leave him alone! He has gone out ______ control. 6. Now I am really confused ________ which problem to solve first. 7. _______ this regard, you should learn from him. 8. Don’t be hard _______ your boy. After all, he is only five. 9. Everyone has gone ________ adolescence.