Since his parents are dead, the poor boy doesn’t know ___________ the money they left.
He sent me an e-mail, ______ to get some further information for his research.
_______ is our belief that improvement in health care will lead to a stronger, more prosperous economy
If she ________ medicine earlier, she _______ ill now.
As we know, a good farmer can ______ a deserted place into a rich land.
— Do you think the MP3 player put its listener ________? — Yes, too much use of it could lead to hearing loss, experts say.