水库主要是为了拦洪蓄水和调节水流、稳定径流量的水利工程建筑物，下图为非洲水库分布图，其中J国自2017年以来雨季降雨量远超往年，71座水坝遭到不同程度破坏，一些公路和桥梁被洪水冲垮，上千人因房屋被毁而流离失所。读图回答下面小题。

下列属于生态系统的是（　　）

补全对话。

A: ____(What/Where) are you going to do tomorrow?

B: I'm going to have ____(a/an) English lesson.

A: What are you going to do in your lesson?

B: We're going to draw some pictures in Renmin Park.

A: That ____(sound/sounds) great! I'm going to ____(see/ read)a film tomorrow.

B: Have a good time!

A: You too. I have ____(do/to do)my homework now. Bye.

B: OK. Bye.

运用所学知识，结合材料，对他们的观点进行辨析。