Reading explorer 2 - Unit 2 : Track B

What would be the best alternative title for the passage ?

• The Amazing Lifespan of Swamp Sparrows

• How Swamp Sparrows Evolved in North America

• The Swamp Sparrows' Traditional Set List

In paragraph B, the word elders means ?

• older swamp sparrows

• adult humans

• birds of another species

In Lachlan's study, about how many swamp sparrows did NOT sing traditional songs ?

• 12

• 600

• 615

Hundreds of years ago, the song of swamp sparrows were probably __.

• completely different from today's songs

• slightly different from today's songs

• exactly the same as today's songs

Which of the following is the example of conformist bias?

• A student memorizes dates for a history exam

• a pet learns to do a trick because its owner rewards it regularly

• A now slang word becomes popular with a group of teenagers