Modals for Deduction, Possibility, and Obligation

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Analyzing Author's Purpose, Tone, and Bias

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question 1 of 14 Grade: Eleven - G11

Q: What modal expresses lack of obligation or necessity, meaning something is not required?

First term a=20, common difference d=17-20 = -3. 9th term = a + 8d = 20 + 8*(-3) = 20 - 24 = -4.

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First term a=20, common difference d=17-20 = -3. 9th term = a + 8d = 20 + 8*(-3) = 20 - 24 = -4.

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Zambia