[ Grammar & Vocabulary ]
The population of the earth ____________ dramatically over the years, and this is causing many problems for our planet.
A. is growing
B. grew
C. has grew
D. has been growing

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Vocabulary › ViewA single number or variable, or numbers and variables multiplied together; separated by addition or subtraction
A. Term
B. Algebraic Expression
C. Coefficient
D. Constant
E. Distributive Property
Grammar › View
My friend Dandan might______(pay) for my lunch tomorrow.
A. will pay
B. to pay
C. pay