—How was your day off yesterday?
—Perfect！It was my grandma's ________ birthday. We had a big cake.
A .eighty B. eightieth C. the eightieth
It’s _________ for us to finish such a difficult program. We have to say sorry to them.
| A．possible | B．impossible |
| C．interesting | D．different |
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
——______ do you go camping?
——Once a month.
A. How long B. How often. C. How many.