30.Which of the following has led to the biggest loss of the coral cover?

　　A.Coral bleaching.

　　B.Increased storms.

　　C.Rising ocean temperatures.

　　D.Outbreaks of coral-eating starfish.

　　解析:细节理解题。由第四段“Storm damage caused nearly half of the coral losses.”可知B正确。

　　答案:B

　　31.What can we do to prevent further coral decline of the Great Barrier Reef according to the article?

　　a.Improve water quality.

　　b.Reduce global carbon dioxide emissions.

　　c.Disrupt the coral-eating starfish’s ability to build structures.

　　d.Control the population of the crown-of-thorns starfish.

　　e.Make ocean absorb more carbon dioxide from the air.

　　A.a,b,c

　　B.a,b,d

　　C.a,c,e

　　D.b,d,e

　　解析:推理判断题。由最后一段提到的“...we can achieve better water quality;we can tackle the challenge of crown-of-thorns”以及“...its future also lies with the global response to reducing carbon dioxide emissions(排放)”可知推知B项为正确答案。

　　答案:B

　　D

　　Deal with loss

　　My little brother,Ty,and I were close growing up.We bickered (斗嘴) over stupid stuff but we told each other everything.Or so I thought.

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