托福(综合)模拟试卷22
试卷名称:2004年1月TOEFL(托福)真题试卷
What is the main idea of the passage?
A.The original atmosphere on Earth was unstable.
B.The atmosphere on Earth has changed over time.
C.Hot underground gasses created clouds, which formed the Earth’s atmosphere.
D.Plant growth depended on oxygen in the Earth’s atmosphere.
A.surrounded
B.changed
C.escaped
D.characterized
A.gasses
B.volcanoes
C.steam vents
D.rocks
A.increases in the carbon dioxide content of sedimentary rocks
B.the formation of bodies of water
C.decreases in the level of nitrogen
D.the formation of clouds
A.accidentally
B.quickly
C.in the end
D.by degrees
A.it was caused by outgassing
B.it was heavier than hydrogen
C.hydrogen became trapped in limestone
D.rays from the sun created equal amounts of hydrogen and oxygen ______.
A.criticize the previous suggestion
B.provide unrelated information
C.propose a similar idea
D.suggest an alternative
A.regardless
B.in addition
C.although unlikely
D.fortunately
A.role of volcanoes in its formation
B.occur in which changes occurred
C.time it took for the Earth’s surface: to cool and nitrogen to appear
D.chemical and physical features of gasses
A.Water
B.Hydrogen
C.Carbon dioxide
D.Nitrogen
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