A、  B、  C、  A问题是一个选择性的疑问句，让对方在A和B中选一个答案。问对方是去Bob的退休聚会还是得做工程，(A)回答说还是待在办公室吧，就是继续工作的意思，因此为正确答案。

Do you live down by the river?
(A) The ferry terminal is on the river.
(B) The river runs north to south.
(C) Yes, that’s where I reside.

Are you going to Bob’s retirement party or do you have to work on the project?
(A) I’d better stay in the office.
(B) Yes, I heard about his retirement from my boss.
(C) No, I’m too tired.