–Whose exam paper is it?–It be Li Lei’s. He always forgets to write his name on it.A. must B. should C. can’t
Looking ________ the window,you can see a lot of boys playing on the grass.
Look,they are ________ the picture on the wall.
The young mother sat down and watched her child ________ a lovely white cat.
—When did you have your school trip? —________.
Oh,you are here.I ________ you came back.