单项选择题
A. Do knock before you enter the classroom. B. Go to your seat and then take out your books. C. Be ready with your book out to start the class. D. Make your pencil sharp after class.
A.sooner B.neither C.either D.rather
A. They were more impressed with slower speed. B. They thought cars were unnecessary. C. They enjoyed just seeing the cars. D. They were easily bored.