—How many ________ are there on the table?  —There are five. 

Children nowadays are bought up on a _______ of television cartoons and soup operas. 

Recently the newspapers have reported several __________ of the coal mines happening in different provinces in China and the government has taken effective measures to stop such things.

Urban (城市) crowdedness would be greatly relieved if only the_______ charged on public transport were more reasonable.

There’s a(n) ___ of peace and calm in the countryside, completely different from that in the city.