当你想知道他们是做什么的时候,你会问:A.What are they doing.B.What do they do?C.How do they do?
Why are you looking at _______like that?
I get up _______ about seven fifty -five.
We usually stay _____ home ____ Saturday afternoon.
Who’s the lady ______ blue?
The man ______ a book in his hand is my uncle.