初一牛津7A Unit4测验卷姓名_____ 班级____ 学号________I.单选题(20分)( )1.Sweet snacks give us energy, _____________ they are not healthy.A. because  B. but  C. so  D. after(  )2._______________ do you swim every day? I swim for half an hour.A. How long  B. How often C. How much D. How many ( )3.Coke is not good ________ children. You should ......