— What shall we do tomorrow? — How about trees?
—Mom, when can I go out to play football?—Finish your homework first, or I ________let you go out.
What time do you expect her________?
Elephants eat________, but they can move _______when necessary.
—What do you think of Liu Huan?—Oh, he is my favourite singer. I think no one can sing________.
—Have you decided where to go for your summer vacation?—Not yet. We _________go to Qingdao. It is a good place for vacation.