题目内容

Renewable fuels can include fuels that are ______ from renewable energy sources

A. systemized
B. designed
C. symphonized
D. synthesized

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Human activities since the beginning of the Industrial Revolution have produced a ______ increase in the atmospheric concentration of carbon dioxide.

A. 40%
B. 50%
C. 10%
D. 30%

Global warming and climate change are terms for the observed century-scale rise in the ______ temperature of the Earth’s climate system and its related effects.

A. highest
B. lowest
C. average
D. common

There are other forms of civil disorder — most _________, football hooliganism.

A. ) apparently
B. ) particularly
C. ) notably
D. )impressively

She _________ that what he said was true, correct and complete.

A. ) affirmed
B. ) consented
C. ) justified
D. ) endorsed