—Would you like to go hiking with us?—Sorry. My grandmother is ill. I'll go to her.
----Why does your brother stay at home every day?-----Because he is young go to school.
He studies ______ at Chinese for one year, but he can still_______speak it.
Spring is coming.I feel like __________weight (减肥).
The scientists in China are trying __________ the ways to reduce the fog and haze (减少雾霾).
I want to cook ________ for my parents.