---Mum, I’m going out with my classmate tonight. ---OK. But you’d better _____ back too late.
Which is short for (缩略) “television (电视)? ” A. UN B. TV C. IQ
There are some __________ on the hill. A. apple tree B. apple trees C. apples tree
—What is your mother?—__________. A. She is my mother B. She is a policeman C. She is a nurse
—_____are you ?—I’m five. A. How old B. Who C. How
Peter and I _________ in Room 807. A. am B. is C. are