About how long have sharks lived on the planet？
A. 25 million years.
B. 150 million years.
C. 350 million years.
D. 500 million years.
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What is the author's attitude in this passage？
A. Explanatory.
B. Persuasive.
C. Humorous.
D. Narrative.
Which of the following best describes the organization of this passage？
A. Specific to general.
B. Cause and effect.
C. Statement and example.
D. Chronological order.
In the early days of ancient Olympic Games ______.
A. only male Greek athletes were allowed to participate in the Games
B. all Greeks, irrespective in of sex, religion or social status, were allowed to take part
C. all Greeks, with the exception of women, were allowed to compete in the Games
D. all male Greeks were qualified to compete in the Games
A．to contractB．being contractedC．contractingD．contract
A. to contract
B. being contracted
C. contracting
D. contract
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