—Henry doesn’t seem like the same person.—_________so much in the war has made him more thoughtful.

I regret ________ that you have failed the exam, but what you should do now is not to regret ______ so much time but to seize every moment from now on.

_____ back problems， always bend your knees when you lift heavy objects. 

The young man came _______ to the airport hurriedly only_______his girl friend had already gone.

The old man came ______ to the railway station, only ______ the train was slowly pulling out of the station.