1 . We can plant more trees around the city because it’s important _____（protect）the Earth.

2 . It is important for us __________ (develop) a good habit of eating healthy food.

3 . It’s our duty to p_________ (保护) the environment when we get along with it.

4 . It’s hard work, it’s _________ (possible) for him to finish it in such a short time.

5 . It’s difficult for me ________ (develop) a good habit.

6 . It is difficult to i________ how to live in a place without mobile (可移动的) phones or cars.

7 . It is important for us _______ (protect) the Earth.

8 . It is of great importance to ________（保护）the environment from being polluted.