Submitted by admin on Wed, 09/16/2015 - 15:20
definition:
very serious or unsafe; urgently needed; marked by a tendency to find and call attention to errors and flaws
sentence:
We expect schools to educate our children to become critical consumers of internet services and electronic media.
While vitamin D is critical for many body systems, including bones and the brain, recent studies that have tested these assumptions haven’t been reassuring.
difficulty:
medium
toefl frequency:
2
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