问题补充：
It cost me a great deal, but I don’t regret a year travelling around the world.
A. spend
B. to spend
C. spending
D. spent
答案：
A. spend
B. to spend
(答案→)C. spending
D. spent
解析：regret to do “遗憾要去做…”； regret doing “遗憾做过…”。 句意：虽然花费很多但是我不后悔用一年时间周游世界。选C
