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5 tháng 4 2020

1. If Lan doesn't get high marks, her parents will be not happy.

2. If Lan doesn't cook well, she won't be able to cook meals for her family.

3. If our school isn't small( or is big), we will hold big activities.

4. If this house doesn't work, our class will not work with it.

5. If the air in the city is not fresh, everybody will not feel well.