--Hello，Mike!--Sorry，____________ I don't think I know you.
A: and
B: but
C: or
D: yet
A: and
B: but
C: or
D: yet
举一反三
- －Hello, may I talk to the headmaster now?－______________ A: Sorry, you can’t. B: No, you can't. C: Sorry，he is busy at the moment. D: I don't think so.
- —Sorry, Liz. I think I was a bit rude to you. —______, but don’t do that again!
- I don't think you two know each other,______? A: do I B: don't I C: do you D: don't you
- -Hello, may I have an appointment with the headmaster?-________________. A: Sorry, I don't know you B: No, you can't C: Certainly. Wait a minute, please D: Let me see
- — Hello, may I have an appointment with the doctor? A: _______. B: Sorry, you had better not. C: Why didn't you call earlier? D: Certainly. May I know your name? E: Sorry, he does not want to see you.