You must eat all kinds of fruits and vegetables a balanced diet.
______black—headed gulls(红嘴鸥) come to Kunming to spend their winter every year.
Helen is my friend. She is in ______ at Beijing No.11Middle School.
---Look at that tall building! ---It is _______tallest building in the city.
Tomorrow is my father's____birthday.I will buy him a gift.
_________of people will visit Beihai .