—What is he doing for vacation? He’s _________her brother.
He is finishing _____ a funny story. And he is thinking about _____ to Beijing for a vacation.
David has a stomachache. _____ .
Mr. Brown is 70 this year. Although he is very old, ____ he works very hard.
–How often do you wash your hair?
Jim often goes to school _____ bike. But today he goes to school _____ the school bus.