Đáp án:
1. People use milk for making butter and cheese
->Milk is used for making butter and cheese.
2. The milkman brings bottles of milk to houses
->Bottles of milk are brought to house by the milkman.
3. People speak English all over the world
->English is spoken all over the World .
4. The students will hold a meeting before the Teacher's Day
->A meeting will be held by the students before the teacher's day.
5. They will build a new bridge by the end of the year
->A new bridge will be built by the end of the year.
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