Your body can barely feel a difference of 0.89℃， but the Earth's ecosystems are so sensitive that even small changes can disturb them. It often starts with the smallest creatures at the bottom of the food chain, eventually affecting bigger animals, many of which could end up becoming extinct.

　　Global warming is also linked to an increase in extreme weather. A larger amount of carbon dioxide traps more energy inside the atmosphere. This changes the patterns of storms and rainfall in many regions and can lead to droughts and floods. Worse still, melting sea ice in warmer oceans is causing sea levels to rise at a speed of more than three millimeters per year, according to The Guardian, which also increases the risk of flooding.

　　“The report should serve as another wake­up call that our activities today have a profound impact on society, not only for us, but for many generations to come，” French Michel Jarraud, secretary­general of the World Meteorological Organization, said at a news conference.

　　文章大意：全球变暖不是只有政府才关心的事，它与我们每个人都息息相关。

　　1．The underlined word “dominant” in the first paragraph means “ ________”．

　　A．common B．indirect

　　C．secondary

　　D．leading

　　答案：D　猜测词义题。画线词所在句意：现在科学家可以95%确定人类是20世纪50年代以来全球变暖的主要原因。所以画线词意为“主要的”。

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