Unit 1 How often do you exercise 卷II 笔答部分(共100分)I. 选择填空(共20分)( ) 1. How often _ Mary exercise? Twice a week. A. do B. doesC. doingD. did( ) 2. Good food and exercise _ me to study better. A. help B. helps C. helping D. to help( ) 3. Is her lifestyle the same _ yours or different? A. as B. inC. at D. to( ) 4. I have a tennis and my friend John _ two tennis rackets. A. have B. play C. pl