28. You can’t complain of being lonely____you don’t make any effort to communicate with others.
He was educated at the local high school, ______ he went on to Beijing University.
_______, and we will do the work better.
With just four years _______, the Brazil Olympic organizers have promised to deliver an equally inspirational ceremony.
________ seems to be no possibility _______ the shy girl can win the first prize in the contest.
It took a long time for the effective use of natural gas ______.