He soon regretted his______decision to get married.A．promptB．quickC．instantD．hasty

I suggested he should______ himself to his new conditions as soon as possible.A．changeB．ad

He is still regretting______to the lecture made by Professor Wang.A．not goingB．not to goC．

He now regrets______harder when he was at school.A．not to studyB．not studyingC．having not

John _________ his work as soon as he was out of hospital.A. resumedB. relievedC. gripp

Having considered the problem over and over again, he regretted having made such a______de

________ he works hard I don’t mind when he finishes the experiment.A) As soon asB