（1）Where is the speaker？
A.In the classroom.
B.On the playground.
C.In the school hall.
（2）Who did Mike write the letter to？
A.The city government.
B.The factory.
C.The police station.
（3）How many trees has Mike planted so far？
A.About 2000.
B.More than 300.
C.About 50.
（4）How will Mike get the money？
A.By selling wastes.
B.By planting trees.
C.By holding charity shows.
（5）What will the listeners do next？
A.Listen to Mike's stories.
B.Join Greener City.
C.Paint the public walls.