【正文】
do? Gao Wei and his classmates went to plant trees. 4. Where did they get water? They got water from the river nearby. 5. What can trees do for people? They can stop the wind. They can make the air fresh and clean. 6. What do the students want to do? The students want to make their country greener. Last Saturday was March 12th. It was Tree Planting Day. Gao Wei and his classmates went to