The best title for this passage would be ______ .
A. Studies of Whales in Captivity
B. Whale's Physiology and Social Behavior
C. Study of Whales' Intelligence
D. Whale
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The United States became involved in Vietnam because it believed that ______.
A. all the world should be under its power
B. it was afraid that the communism would spread throughout Southeast Asia and beyond
C. it supported the division of the South and North
D. it liked to play "domino"
What is the best title of the passage？
An Introduction of the Kindergarten
B. The Origins of the Kindergarten
C. The Foundation of the Kindergarten
D. The Development of the Kindergarten
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.
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.
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