He is only too ready to help others, seldom, ____ refusing them when they turn to him.
Hardly ______ on the bus ______ the bus drove off.
_____ hardly made Mike pay any attention to _____ his mistakes.
Is this school ______you studied in three years ago?
Mr.Wang ______ the person referred to at the meeting be put in prison.
It is well known to all that water, ______ enough, can change into ice quickly.