What is the main idea of the passage?
A.Clara Barton became a nurse during the American Civil War.
B.Clara Barton was a kind and strong woman who helped people in need.
C.Clara Barton helped wounded soldiers and she was the founder of the Red Cross.
D.Clara Barton worked for disaster victims until she was old.

He has been waiting for this letter for days, and at ________ it has come.
A.the moment        
B.last    
C.present 
D.the end

______(57)
A.that
B.who
C.
D.when

Henry David Thoreau was an American writer who is remembered for his faith in religious significance of the nature. 
A.an
B.is
C.for
D.the nature

Henri Dunant asked to found societies devoted _________ helping the wounded.

A.at
B.by
C.for
D.to

In which environment would you NOT expect a Pfiesteria bloom to develop?
A.a marsh which absorbs waste water from a nearby pig farm
B.a river located near a rock quarry
C.a cool mountain lake teeming with fish
D.a river that flows through rich farmland

A.name
B.natural
C.native
D.nation

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The online game “Dumb ways to die” quickly                  with young people after being released in 2013.
A.took on     
B.caught up    
C.caught on     
D.took up

Which of the following statements can be inferred from the second paragraph?
A.Boys don't like to be with their parents as much as girls do.
B.A recent study found that parents talk differently to their sons and daughters.
C.Parents don't enjoy talking with their sons as much as with their daughters.
D.Girls have more practice discussing sadness than boys do.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

A.importance       
B.relation 
C.happiness  
D.employment