Maybe you have seen the Great Barrier Reef, 　8　some 1, 800 miles from New Guinea to Australia. Tour guides regularly take visitors to　9　the reef. On one tour, the guide was asked a question. “I notice that the lagoon(浅水湖)side of the reef looks　10　and lifeless, while the ocean side is lively and colorful, ”a traveler observed. “　11　is this? ”

　　The guide gave an interesting answer, “The coral(珊瑚)around the lagoon side is in　12　water, with no challenge for its survival. It　13　early. The coral on the ocean side is constantly being　14　by wind, waves, storms—surges of power. It has to fight for　15　every day of its life. As it is challenged and tested it changes and　16　. It grows healthy. It grows strong. And it reproduces. ”Then he added this telling note, “That’s the way it is　17　every living organism. ”

　　Like coral　18　by the sea, we grow. 　19　demands can cause us to grow stronger. Mental and emotional stress can produce strength and determination. Spiritual testing can produce　20　of character and faithfulness.

　　【文章大意】大堡礁上经常受到海水冲击的珊瑚生命力更加旺盛, 但是那些没有受海水冲击的反而会死得更早。作者从而得出, 在我们的人生中, 经常遇到挫折, 会使我们更加具有能力。

　　1. A. warn B. remind

　　C. inform

　　D. persuade

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