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III. Put in the missing words to complete the sentences with the verb to do.
1. It’s cold. Keep your scarf on and do your coat ______.
2. It’s time for you and your sister to do ______ the room. It’s filthy.
3. Peter should do his ______ to win the tournament. He’s an excellent chess player.
4. If you go in for swimming or cycling, it’ll do you only ______.
5. I could do ______ a cup of tea. I’m so thirsty and tired.