听一段材料,回答下面几个小题。 Where is the speaker giving the talk? A.On a hill. B.In a forest. C.Beside a lake. What can the listeners do at Summit Lake? A.Rest and take photos. B.Go boating or swimming. C.Cook lunch over a campfire. What would be part of the trip? A.Climbing up rocks. B.Fishing in a stream. C.Walking through a field.