当你询问“他们正在干什么”时,说:A. What are they doing ?B. When do they go home ?C. Where are they going ?
hey bring gifts _____ us.
We sing special songs _____ Christmas
These are Christmas lights _____ our house.
He isgood actress. A.a B.an C.\
He often ________a bus to work . A.takes B.take C.by