距离2017年上半年的四级考试已不足一个月的时间，我们再来按题型多做做之前的真题吧!本篇整理的是2016年12月试卷二阅读部分的选词填空。

选词填空的原文及题目：

The ocean is heating up. That's the conclusion of anew study that finds that Earth's oceans now(27)heat at twice the rate they did 18 years ago.Around half of ocean heat intake since 1865 hastaken place since 1997, researchers report online inNature Climate Change.

Warming waters are known to (28)to coralbleaching(珊瑚白化) and they take up more spacethan cooler waters, raising sea (29). While the top of the ocean is studied, its depths are moredifficult to (30)The researchers gathered 150 years of ocean temperature data in order to getbetter (31)of heat absorption from surface to seabed. They gathered together temperaturereadings collected by everything from a 19th century (32)of British naval ships to modernautomated ocean probes. The extensive data sources, (33)with computer simulations(计算机模拟), created a timeline of ocean temperature changes, including cooling from volcanicoutbreaks and warming from fossil fuel (34).

About 35 percent of the heat taken in by the oceans during the industrial era now residents ata (35)of more than 700 meters, the researchers found. They say they're unsure(36)whetherthe deep-sea warming canceled out　warming at the sea's surface.

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