问题
选择题
At first I regretted _____ them to stay, but we soon became great friends.
A.to invite
B.invited
C.to have invited
D.inviting
答案
答案:D
题目分析:考查非谓语动词。句意:起初,我后悔让他们留下来,但是我们很快成了好朋友。regret doing sth表示后悔做了某事;regret to do sth遗憾(将要)做某事,根据句意可知,invite这个动作已经发生,regret后应该用动名词,排除A、B、C,故选D。