It was Saturday. Alice and her dad were driving to the park to play with her ________. Alice ________ the window as she rode in the car. There was garbage beside the road, and the air didn’t look clear. It made Alice ________.

“Our planet is in trouble. Many people throw garbage out of their cars!” Alice ________ her dad. “Our planet also has other problems,” said her dad. “People ________ trees. There’s less place for some ________ to live in than before and the forests are slowly going away.”

It made her sad to think that she might not see them some day. So, she asked her father if there was anything ________ that people could do to help the Earth. Her dad said a lot of things people need in daily life come from nature. And by keeping these things safe, humans can protect the Earth well. “Oh, I know what I can do. I can save water. I can ________ the water tap while I’m brushing my teeth,” Alice thought to herself.

When Alice got to the park, she saw some garbage on the ground. She got some gloves from their car to ________ the garbage. Since there was still a little time before Alice met her friends, Mr. Brown volunteered to join his daughter in the clean-up ________. It brought Alice an unforgettable experience.