Such is human nature that many people don’t value things they possess until they’re lost them.
Robert is said______ abroad, but I do not know what country he studied in.
Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
The country life he was used to______greatly since the opening policy.
He______ on this paper for ten minutes but he______only about sixty words.
______fashions differ from country to country may reflect the culture difference from one aspect.