--- What do you think we can do for our parents? ---You _____ do anything except to be with them and be yourself. A. don't have to B. oughtn't to c. mustn't D. can't
This is the very reason ______ he gave for his coming late to the meeting.
Some children are too selfish today. They should be taught to _____things with others so that they will show concern for others.
Some people would rather ride bicycles as bicycle riding has _____of the trouble of taking buses.
--Do you have any trouble _____the work? ---No. in fact we have finished it already.
________ large number of people think ________ truth has been hidden on purpose.