Ⅰ、单项选择（30分）
1. “_____ do you go shopping?” “Once a week.”
A. What time B. How long
C. How often D. How soon
2. We usually do some cleaning _____ weekends.
A. for B. on C. over D. in
3. _____ it is raining, _____ he is still working outside.
A. Although; but B. Although; /
C. But; although D. /; although
4. My parents want me _____ milk every day.
A. to drink B. drink C. drinking D. drank
