Viết lại câu không làm thay đổi nghĩa: 1. Keeping the environment clean is very important. 2. She has taught the children in this remote village for five months

Viết lại câu không làm thay đổi nghĩa :
1. Keeping the environment clean is very important .
- It's...............................................................
2. She has taught the children in this remote village for five months.
- She started .................................................