[ Vocabulary ]
Forces that are equal in size and opposite in direciton
A. Unbalanced Forces
B. Air Resistance
C. Balanced Forces
D. Bernoulli’s Principle
E. Constant

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Grammar › ViewTo do something bad without being punished for it.
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We should ______ for the heavy rain.
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If people want to buy new clothes, ___ have to earn money.
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