Excuse me, is this the train to Shanghai？ （)

-- Excuse me，but talking isn't allowed here .

-- _____

A.Oh，sorry.I didn't know .

B.That's all right .

C.Yes，we certainly do .

D.No，not at all.

-Excuse me, is this seat free？ -().

A: No, you can't sit here

B: Sorry, it is taken

C: Yes, it is seated by a boy

D: Yes, but I don't know

A.I don’t know

B.It’s been delayed one hour

C.You have to be patient

D.Don’t ask me

—Why didn’t you come to my birthday party yesterday？

-- ________.

A Excuse me, my friend sent me a flower

B Fine, I never go to birthday parties

C Well, I don’t like birthday parties

D Sorry, but my wife had a car accident

-Excuse me, sir. Where is the post office？ -().

A: You can't ask me.

B: Pardon？ I have no idea

C: Please don't say so

D: Sorry I don't know, but you can ask the man over there

A.Thirty dollars.

B.I don't know.

C.Excuse me？

D.Thanks a lot.

—Excuse me, but can you tell me the way to the post office？ —_______

A、Don’t ask that.

B、Go stragiht down this street. Turn left at the first traffic lights. You can’t miss it.

C、No, I can’t say that.

D、No, you’re driving too fast.

--Excuse me, but can you tell me the way to the post office？

-- .

A. Don’t ask that

B Sorry, I’m a stranger here

C No, I can't say that

D No, you’re driving too fast

-- Excuse me for opening your letter by mistake .

-- _____

A.Never mind .It was an old glass anyway .

B.Really？How did you do that ？

C.No，I didn't open your letter .

D.You haven't seen my letter ，have you？