---- Do you know how to prevent (预防) the H7N9 flu?---- You can ask the doctor for some ________.
It’s good _________in a neighbourhood ________ that.
What would you like ________ supper?
——What’s wrong with the boy? ——He is a(an) ________boy. He can’t run fast.
Would you like ________ to drink?
---There is a river ________ the two cities. ---________ the river there is a bridge.