Grammar: must, mustn't and needn''t / don't have to

Complete the sentence She always pays by credit card so that she

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Complete the sentence with “mustn't” or “don't / doesn't have to” (Hoàn thành câu với "mustn’t" hoặc "don't / doesn't have to")

She always pays by credit card so that she … carry a lot of money with her.

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Giải thích

doesn’t have to

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