—What field will your son go into after graduation from Nanjing University? —I’m not quite certain, but he ____ a good teacher of English.
.Mike didn’t notice Alice entering his room. He __________ a phone call.
The policeman _______ the facts again and again, but couldn’t piece them together.
.-Are there any tickets left? -Sorry. There are ________, if __________.
If I were _________ younger, I would do ___________ I am interested in.
-Haven’t we met each other at ________ party? -Yes, but I can’t remember whether it is _________ Christmas when we were in college.