Viết lại các câu sau đây dựa vào các từ gợi ý sao cho nghĩa không đổi

1. People should use energy-saving bulbs to save electricity.

→  Energy-saving bulbs ……………………………………………………………..……..

2. “When the sun rises, I feel like singing,” Kitty said.

→Kitty said that …………………………………………………………………………………..

3. Practice English everyday or you can not improve your English.

→Unless …………………………………………………………………………….……….

4. She has taught her children to play piano for 4 years.

→She started………………………………………………………………….……..