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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
Sally paid for her travel in advance, but it wasn't necessary.
A. Sally couldn't have paid for her travel in advance.
B. Sally might not have paid for her travel in advance
C. Sally needn't have paid for her travel in advance
D. Sally may not have paid for her travel in advance
Sally paid for her travel in advance, but it wasn't necessary.
A. Sally couldn't have paid for her travel in advance.
B. Sally might not have paid for her travel in advance
C. Sally needn't have paid for her travel in advance
D. Sally may not have paid for her travel in advance
Đáp án C.
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