[ Grammar ]
Consumption of fossil fuels at an alarming rate can ____ to global warming which can further result in melting of polar ice caps and increase in sea levels.
A. lead
B. drive
C. attach
D. run

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Grammar › ViewWhich word is spelled incorrectly in this sentence?
Pure silver conducts electricity better than any other mettle.
A. silver
B. mettle
C. electricity
D. conducts
Grammar › View
I have known Sara since we were ten years old and she is my closest friend. Sara is my ____ friend.
A. older
B. better
C. longest
D. best