According to the passage, what causes the unique color and look of   hummingbirds?
A.The color of the feathers.              
B.The structure of the feathers as well as  pigmentation.
C.The rapidity of flight.
D.The pigmentation of the body.

The pronoun ''they" in paragraph 2  refers to                        .
A.possibilities for genetic deficiencies   
B.cases of genetic deficiencies
C.discoveries concerning hereditary  mechanisms
D.effects of genetic engineering misuse

Which of the following is the main topic of the  passage?
A.Standard speech     
B.Idiomatic phrases
C.Dictionary usage             
D.Different types of vocabulary

Why does the author believe that the Mandans were skilled  farmers?
A.They developed effective fertilizers.
B.They developed new varieties of corn.
C.They could grow crops despite adverse  weather.
D.They could grow crops in most types of  soil.

The passage implies that Melville stayed in  Tahiti because                   .
A.he had unofficially left his ship         
B.he was on leave while his ship was in port
C.he had finished his term of duty    
D.he had received permission to take a vacation in  Tahiti

Which of the following could best replace the word  “somewhat”?
A.in fact     
B.a little       
C.indefinitely
D.a lot

What is the main purpose of the  passage?
A.To introduce the idea that dietary fat increases the blood cholesterol  level.
B.To make people know about the relationship between eggs and  cholesterol.
C.To persuade people that eggs are unhealthy and should not be  eaten.
D.To convince people to eat “designer” eggs and egg  substitutes.

What is the word “particular” in the second paragraph closest in meaning to?
A.specific
B.usual
C.definite
D.

The word “cope with” in the passage is closest in meaning to ______.
A.fight against 
B.deal with
C.suffer from
D.

Listen to the presentation about unusual British festivals and choose the correct option to complete the sentence.
During a pancake race, you have to __________________.
A.eat as many pancakes as possible
B.run as fast as possible while tossing a pancake in a pan
C.run and jump over ropes without dropping the pancake
D.Ø