What is the probable meaning of the word "hitchhike" in paragraph three？
A. Walk on foot.
B. Run quickly.
C. Stop a car and ask for money.
D. Stand on the road and signal to drivers for a free lift.
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Which of the following does not illustrate the intelligence about whale？
A. Their learning and problem-solving skills, together with their curiosity and often eager interactions with humans.
B. The large brains of whales.
Complex behavior.
D. Relying on hearing.
What is the best title of the passage？
A. The Olympic Games
B. The Olympic Games And The International Olympic Committee (IOＣ)
C. The International Olympic Committee (IOＣ)
D. The Winter Olympics And The Summer Olympics
The sperm whale's visual centers of their brains are smaller proportionally than those in
A. their eyesight is better than hearing
B. whale brains generally show as much or more folding area as is seen in humans
C. complex behavior. may reveal more about whale intelligence than brain size
D. this folding increases the surface area and has been observed in more intelligent animals
听力原文：W: Besides this tie I also want to buy that shirt.
M: Sure. The shirt is ten dollars and the total price is twenty.
Q: How much does the tie cost？
(10)
A. 5 dollars.
B. 10 dollars.
C. 15 dollars;
D. 20 dollars.
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