____you had worked hard, you would have easily passed the final test.
| A．When | B．If | C．Thought | D．Since |
---- You _____ have given them some advice.
---- So I did, but who cared what I said?
| A．must | B．ought to | C．might | D．could |
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 |