1．How long are they planning to stay there? ____ two weeks.
A．For B．Of C．On D．With
2．--________have you visited the Great Wall?
--Once．
A．How many times B．How often C．How soon D．How long
3．--- I have a terrible stomachache.
---Oh, you should ____.
A．see a dentist B．eat more food
C．listen to some music D．lie down and rest
4.______ is good for our health.
A. Drink milk B. Drinking milk C. Drinks milk D. You drink milk
