persons/things/flowers/fruits/animals

• A group of boys/ a gang of robbers/ a band of musicians.
• A litre of milk, a cup of coffee, a bag of rice, a shelf of books, a fleet of ships.
• A colony of ants, a herd of elephants, a flock of sheep, a swarm of bees, a pride of lions.
• A bunch of roses, a bunch of grapes, a hand of bananas, a cluster of grapes.
• http://www.youtube.com/results?search_query=a+group
• http://www.youtube.com/results?search_query=how+to+call+a+group+in+grammar&oq=how+to+call+a+group+in+grammar&gs_l=youtube.12...8658.22915.0.25851.47.37.0.1.1.3.1249.6564.4j29j0j1j6-1j1.36