get...across “使……被理解”。

　　10．There is a 20－minute parking ________ here, so we must get back to the car very quickly. If we stay longer, we need to pay extra fee.

　　A．freedom

　　B．limit

　　C．timetable

　　D．schedule

　　【答案与解析】　B　a 20－minute parking limit “20分钟的停车限制”。limit “限制；限度”。

　　Ⅲ.阅读理解

　　Deep in the Atlantic Ocean, explorers have found what may be the most valuable sunken treasure in history. On May 18, a company called Odyssey Marine Exploration announced that its deep－sea divers had raised 17 tons of colonial－era coins from a shipwreck in the sea. More than 500,000 silver and gold pieces were flown by cargo jet to a secret location in the United States, where they are being examined by experts.

　　The coins, most of which are silver, have an estimated value of $500 million. Some coins may earn the treasure hunters several hundred dollars. But others will bring in many thousands of dollars. Odyssey hired Bruyer to examine the coins. A coin's value is based on its condition and rarity (稀有), as well as the story behind it.

　　Until now, the most valuable shipwreck discovery was made in 1985 in the waters near the Florida Keys by treasure－hunter Mel Fisher. The coins and loot (物品) he

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