Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb（炸弹） was _____, three of whom were killed.
A. set about B. set off C. set up D. set out
He is never allowed ________ in the room.
A．to smoke B．smoking C．smoked D．to be smoked
They want to know ________ do to help us.
A．what can they B．how they can C．what they can D．how can they
— I must have a balanced diet. I carry too much fat.
— ________.
A．Congratulations B．Good idea C．Good luck D．Don’t mention it
— Mr White has been working all the morning with no rest.
— He is a(n) ________ man. He never looks tired.
A．energetic B．powerful C．lovely D．attractive
Mary is being punished（惩罚） by the headmaster. That was______ she broke the school rules.
A．why B．because of C．the reason why D．because
