one possible version：

China is a country with a large population. The excessive population growth has brought many problems, such as food shortage, housing shortage, the shortage of resources, traffic jams, employment difficulties, and poor medical conditions.

题目分析：本文是材料作文，考生在写作之前必须认真分析人口过多造成的问题，应该用第三人称做主语。时态是一般现在时。

【亮点说明】 本文恰当地运用了些短语和句式，如such as ; with结构来说明人口过多造成的诸多问题。