2016年5月7日托福阅读真题+题目+答案：Life on Mars

2016年5月7日托福阅读真题+题目+答案：Life on Mars

Astronomers strongly suspect that Mars currently has no liquid water, diminishing the chances for life there now. But running water and a denser atmosphere in the past could have conceivably fostered conditions suitable for the emergence of life. And there is some evidence that water did flow on Mars long ago, presumably before the planet entered its current ice age less than a billion years ago.

1.The word “diminishing” in the passage is closest in meaning to

A.ending

B.spoiling

C.changing

D.reducing

Perhaps ancient fossils of long-dead Martian life – simple bacterial life possibly enduring prior to the arrival of the numbing cold that likely prohibited sustained life as we know it – might show paleontological evidence for rudimentary life. If a severe ice age had locked Earth into a deep freeze a billion years ago, the only evidence that life arose on our planet would be microscopic remains of fossilized microbes – and humans would not be here to examine it.

2.The word “rudimentary” in the passage is closest in meaning to

A.possible

B.primitive

C.microscopic

D.continued

3.The word “it” in the passage refers to

A.deep freeze

B.evidence

C.planet

D.life

Surprisingly, one place to look for Martian fossils is right here on Earth. Paleontologists agree that a small fraction of meteorites found on Earth’s surface have actually come from the Moon and from Mars. These meteorites were apparently blasted off these bodies long ago during an impact of some sort, thrown into space violently enough to escape their parent bodies, and eventually captured by Earth’s gravity, ultimately to fall to the ground. The most fascinating of these rocks are surely a dozen or so from the Red Planet (Mars) – their trapped gases match exactly those present in Mars’s atmosphere- and one of them may harbor fossil evidence for past life.

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