揭阳一中2013-2014学年度高三第一学期阶段考试（二）
英 语
ⅰ语言知识及应用（共两节，满分45分）
第一节 完形填空（共15小题，每小题2分，满分30分）
阅读下面短文，掌握其大意，然后从1-15各题所给的a、b、c和d项中，选出最佳选项，并在答题卡上将该项涂黑。
to know just what the effects of global warming will be in the future is extremely difficult, if not impossible.
scientists use computer models to study the __1__ of global warming. these computer models have been fairly consistent in __2__ general future trends, but often __3__ greatly when looking at the specifics.
some scientists say global warming has already been going on for a while. others say that we do not have enough information now to know for sure. despite the __4__, most scientists are convinced that greenhouse gases are __5__ the earth. what they are still trying to figure out is how __6__ temperatures are rising, and what will happen as a result.
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