If my frirends have any problems, my door is ______ open to them.
——________do you go to the dentist? ——Let me see, twice a year, maybe.
It’s _________ for us to finish such a difficult program. We have to say sorry to them.
Chen Wei is a ______. He can sing and write songs very well. A. scientist B. musician C. pilot
—Tom, what do you want to do this weekend? —I ______ a picnic with my family in the country. A. have B. are having C. will have
Please tell my father ______ the talk tomorrow. A. don’t forget B. not forget C. not to forget