Unit 2单元测试题I、单项填空1. I dont think teenagers should be allowed to drive , because they are _. A. too serious B. not serious enough C. not enough serious D. to serious2.He up early. But now he doesnt get up early.A. is used get B. used to get C. was used to get D is used to getting3. He usually spends much time _his lessons.A. doing B. to do C. did D do4. I always go to sleep _the light on.A. inB. with C. toD for5. They used t