—How about singing songs with me?—I’m sorry I can’t. I help my father with his work. A. have to B. can C. may
---Excuse me, could I take this seat? ---Sorry, __________.
---I’ll go to the USA next month. ---__________ for?
The Greens used to live in London and now they _________ in Beijing.
---What are you going to do when you grow up? ---A singer, but my parents wish me _________ a teacher.
---Jim, ________ read books while you are walking in the street. It’s very dangerous. ---OK, thank you.