— Another cup of coffee?
— No, thanks. I think I’d better for the airport immediately.
A. set up
B. set down
C. set off
D. set about
网友回答
A. set up
B. set down
(答案→)C. set off
D. set about
解析：考察set的词组。Set up建立 set down 记下 set off 出发，动身 set about 开始
句意为，我最好立刻就出发去机场。