题目内容：

听下面一段独白，回答以下小题。

1.What caused the number of black bears to decrease?

A.The fires. B.The pollution. C.The lack of food.

2.Where will the students have these trips?

A.In a museum. B.In a park. C.In a zoo.

3.When can the students have Trip 2?

A.On July 8. B.On July 15. C.On July 22.

4.What should students take in Trip 2?

A.A backpack. B.A warm coat. C.A bright-colored hat.