It is the year 2025 now. Gao Wei works at a bank in Hohhot, in Inner Mongolia. He often spends his weekends and holidays picking up trash in the mountains.

Ten years ago, while hiking (徒步) in the mountains, Gao Wei saw lots of plastic bottles in the bushes. They made the beautiful scenery look messy (脏乱的), so he decided to clean them up. From that day on, every time he goes out, he brings a big bag with him. He picks up litter in forests, on grasslands, and along rivers.

1. 1.Where does Gao Wei work?

A    In a bank.

B    In a school.

C    In a hospital.

D    In a shop.

2. 2.When did Gao Wei start picking up trash?

A    In 2010.

B    In 2015.

C    In 2020.

D    In 2025.

3. 3.What does Gao Wei take when he goes out?

A    A small box.

B    A plastic bottle.

C    A book.

D    A big bag.

4. 4.How did Gao Wei use the money from selling recycled trash?

A    Bought food.

B    Bought a bag.

C    Helped others.

D    Bought books.