grammar unit 9 c5

When you get to the airport, you _______ check in. a) can b have to c) don’t have to d) can’t

When you check in, you __________ show your ticket and passport. a) can b have to c) don’t have to d) can’t

If you want, you__________ do tax-free shopping after you go through security. a) can b have to c) don’t have to d) can’t

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