A、  B、  C、  A题目为叙述自己在老板回来之前不可以离开办公室这一事实的陈述句。

Can I send you the bill for Mr. Fletcher’s order?
(A) Yes, the original number.
(B) An official document.
(C) Please do. I’ll see him today.

I shouldn’t leave the office until my boss gets back.
(A) That could be a long time.
(B) In a meeting with a client.
(C) I’ll return your call soon.