It cost her a lot of money,but she doesn’t regret _ a year traveling around the world.A) to have spent B) to spend C) spent D)spending这个题要从那下手?

regret to do sth :后悔去做某事(但没有做)
regret doing sth:后悔做了某事(已经做了)
由原题可知他花了很多钱(做过了)，但不后悔旅游世界(也是做过了)，所以选D.

regret to do sth .对要做的事感到遗憾
regret doing sth .对做过的事感到遗憾
regret having done 对已发生的事感到遗憾。
由题意,D
理解句意,多背句型就好了。

badly _ continue in need of my assistant. 2、she didn’t knowher __partly_ but not

regret doing sth.

首先你要知道regret的用法 这题就好说了
(一)regretvt.遗憾；抱歉I regret spending so much time on playing computern.悔恨；痛惜she told me with regret that she could not catch that chance(pl) 婉言辞谢Ito send one's regrets送出辞谢的回帖(二)regret to do 表示"因要做某事而遗憾regret doing 表示"后悔做了某事",.Regret for对自己的过失感到遗憾或后悔.Regret at 表示对别人的行为感到遗憾,.to one's regret 非常可惜 much to our regret 非常抱歉 much to one's regret 非常抱歉 regret to say 遗憾地说 to one's regret 非常可惜hear with regret of 听到．．．．．．觉得遗憾
旅行花了很多钱 但是她不后悔