Let’s ____planting the trees until tomorrow. I think it’s going to rain.
The story book _________ for two weeks .
—Look,your father is playing the piano over there.—He________ be my father. He has gone to Beijing.
Thank you for giving me __________.
Chinese is used ______ the largest number of people in the world.
The woman has something wrong with her eyes and has to have them _________.