The old teacher lay wide awake on his bed, ___________ all the problems he had to deal with the next day.
Whether by accident or ___________,he arrived too late to help us.
I was going to do some shopping in Golden Eagle, but __________ watching TV at home because of tiredness.
Don’t touch ______ live wire, oryouwill get______ shock.
— I’m sorry to have broken your cup. — __________, Kate.
The new teacher made a good____ on the students by her rich knowledge and humorous talk.