★ TOEFL Adjective and Adverb
Virtually . . . cells in the human body contain DNA in their nuclei.
A. they are all
B. all are
C. all
D. they all
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Approximately 31 percent of the world’s land area is forested, or covered with trees . . .
A. all year it is
B. all year
C. as all year
D. in all year
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