Viết lại câu cho nghĩa không đổi

Dưới đây là các câu được viết lại với nghĩa không đổi:

1. Keeping the environment clean is very important.
-> It is very important to keep the environment clean.

2. They built that house two years ago. (for)
-> They have built that house for two years.

3. Living in the city is exciting than living in the countryside. (boring)
-> Living in the countryside is boring compared to living in the city.

4. It rained heavily, so we cancelled the trip to the countryside.
-> Because it rained heavily, we cancelled the trip to the countryside.

5. My sister loves hanging out with friends at weekends.
-> My sister is fond of hanging out with friends at weekends.