22. In order to _______ the heart of his former sweetheart, the young man gave up smoking and alcohol, worked extra hard but all his effort ______ waste.
It was the parents, rather than the boy that __________ for what the boy had done.
Could you drive me to the supermarket at noon if _________?
The Chinese ________ fifty-six nationalities, each of whom has their own characteristics.
Jenny hopes that Mr. Smith will suggest a good way to have her written English ______ in a short period.
--- Where did you get to know her? --- It was on the farm _____ we worked.