—It’s one o’clock now. I must go.—It’s raining outside. Don’t leave it stops.A. when B. since C. until
– _________ you spell it ? – Yes, I can. P-E-N, pen.
– Are those your friends ? – ________.
Mum, _______ my teacher, Miss Gao.
Mr. Lee is ________ teacher. ________ is from China.
熟人之间见面时表示礼貌的常用语是_________