Unfortunately, getting into the Amazon rainforest and collecting information are very difficult. To study past climate, scientists need to look at fossilized pollen, kept in lake muds. Going back to the last ice age means drilling deep down into lake sediments (沉淀物, which requires specialized equipment and heavy machinery . There are very few roads and paths, or places to land helicopters and aeroplanes. Rivers tend to be the easiest way to enter the forest ,but this still leaves vast areas between the rivers completely unsampled(未取样). So far, only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.
1. The underlined phrase “mopping up” in the second paragraph means ________.
A. cleaning up
B. taking in
C. wiping out
D. giving out
答案解析:答案为B。本题为词义推断题。结合上下文,与mopping up并列的是 “helping to slow global warming”,由此可以推断,mop up 就是去除CO2;并且后面的 “Currently the trees in the Amazon take in around 500 million tones of CO2 each year…”中的 “take in” 也对此进行了呼应,故答案为B。“clean up”意为 “清洁”; “wipe out” 意为 “消灭,彻底摧毁”; “give out”意为“分发散发2. How will the Amazon rainforest react to future climate change?
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