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NORWAY: The world's oceans are under greater threat than perviously believed from a "deadly trio" of global warming. declining oxygen levels and acidification, an internasional study said on thursday.

the ocean have continued to warm, pushin many comercial fish stock towards the poles and rising the risk of extinction for some marine species, despite a slower pace of temperature risess in the atmosphere this century, it said

"risk to the ocean and the ecosystem it supports have been significanly underestimated," according to the international programme on the state of the ocean (IPSO), a non governmental group of leading scientists.

"the scale and rate of the present day carbon perturbation, and resulting ocean acidification, is unprecented in earth's known history," according to the report, made with the international union fo conservation of nature.

the ocean are warming because of the heat from a build up of green house gases in the atmosphere. fertilize and sewage that wash into the oceans can cause blooms of algae that reduce oxygen levels in the waters. and carbon dioxide in the air can form a weak acid when it reacts with sea water-R

Question
 1. what is the topic of the text?
       A. The greeen house effects
       B. The deadly trio of threats to the world
       C. The global warming and marine species
       D. The worst condition of the world ocean (y)
       E. The treats of global warming to the world's ocean

2.  according to the text, what makes the marine species possibly ectinct?
      A. The oxygen levels
      B. The ocean marine life
      C. The increasingly warming oceans. (y)
      D. The movement of fish stocks
      E. The slow pace of temperature rise

3.The world's ocean are under greater threat than perviously believed.... "(paragraph 1)
   The underlind word means.....
      A. Next
      B. after
      C. until
      D. while
      E. before (y)