Bargaining is not common in shops, and customers are expected to pay the marked price for
A. 讨价还价在商店里是不平常的，并且顾客应按市场价付款。
B. 讨价还价在商店里是不普通的，顾客期望是按标明的货架付款。
C. 讨价还价在商店里是不常见，顾客被期望按标明价买货物。
D. 讨价还价在商店里是不常见的，顾客应按标明的货价付款。
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What characteristics make dolphins easy to train as star performers？
A. High intelligence.
B. Sociability.
C. Enjoying playing with each other and also with the humans, with whom they come in touch.
D. Being able to remember humans that they have met.
A．itemB．measureC．meansD．way
A. item
B. measure
C. means
D. way
What is the population of the world in 2000 according to the passage？
About 9 billion.
B. About 6 billion.
C. About 3 billion.
D. About 5 billion.
What kind of problem can be solved by the new technology？
A. It can help mankind solve the problem of planting tomatoes.
B. It can help mankind solve the problem of watering.
C. It can help. mankind solve the problem of salt.
D. It can help mankind solve the problem of feeding its population.
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