Depression is the leading cause of suicide, __ __ in turn is the third leading cause of death among 15 to 24 year olds in the United States.
Never in the past twenty years so greatly as today.
—How should I deal with new words in reading? —Well,you’d better not stop ________ you come to a word or phrase you don’t know.
He didn’t make _____ clear when and where the meeting would be held.
there for some time,Mr. Johnson knew the place quite well.
He found them ______ at a table ______ .