A、  B、  C、  B(A)一般同意对方意见的时候使用，不能回答特殊疑问句。(B)该题询问工作时间，回答说自从公司成立后就在这里工作，所以正确。(C)如果只看到how long回答，可能会选这项，但是询问的是时间，所以错误

Is there anything else I can do for you?
(A)Sure, I can help you.
(B)That’s it for now, thank you.
(C)Yes, that’s what I said

How long have you been working for this company?
(A)I think so, too.
(B)Ever since this company was established.
(C)About 20 miles