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nếu câu trả lời hữu ích nhé!
1. Although it is much more expensive to maintain the current production lines, the company hasn't invested in the new one yet.
2. We hold "Green Week" twice a year because we want to enhance public awareness of environmental protection.
3. Since the area around the beach is full of trash, no one wants to go swimming or sunbathing there.
4. They prepared carefully for the performance, therefore, it turned out to be perfect.
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