Make sure the gas is turned off after a bath, which would _______ cause danger.
If you want to do the experiment again, you had better be more careful_______ you made a mistake.
------ He should have been warned of the danger. ------_________, but he wouldn’t listen to me.
______ a mobile phone can you ring _____ you want to talk with anywhere.
We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time
______ with great pressure in the job market, university graduates start to make use of blogs to attract publicity.