A．exceeds
B．outnumbers
C．overtakes
D．outstrips
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In Paragraph 3, the word "spikes" （in boldface) probably refers to ______.
A．the increases above the smog standard
B．the irregular readings about air quality in some areas
C．the occurrences of smog in Los Angeles
D．the current standards demanded by ALA -
A．useless
B．impossible
C．inappropriate
D．unnecessary -
If the test taker finds an item to which an answer is not known, it may be __ to leave it blank and go on with the test.
A．probable
B．considerable
C．advisable
D．preferable -
The second paragraph tells us that natural religious knowledge can hardly keep a person good because ______.
A．he is not always willing to sacrifice himself
B．he does not rely upon God
C．he may sometimes die for right action
D．he may suffer crisis in his career -
The passage describes the magnetosphere as a barrier because ______.
A．it is strongest in the polar regions and the magnetic lines bunch together
B．it increases the speed of the particles from the solar wind
C．it prevents particles from the solar wind from easily entering the Earth's atmosphere
D．its position makes it difficult to be observed from the Earth