—I talked with a foreigner for a long time yesterday.

—Great! It’s a good ____________ to practice English.

A. habit B. chance C. skill D. exercise

B 【解析】試題句意：--我昨天和外國人聊了一段時間。--好的！那是練習(xí)英語的好機會。A.習(xí)慣； B.機會； C.技能； D.練習(xí)。根據(jù)句意可知，是機會。故選B。
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ship engines. Such noises are added to natural sounds.

These sounds include the breaking of ice fields, underwater

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Decibels (分貝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety five would have the same effect（效果）.

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B. stop industrial and scientific research in oceans.

C. try their best to make no noise.

D. protect ocean animals from harmful noises.

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