Sample version:
Vancouver is a coastal seaport city in western Canada. More than 640,000 people live in the city. Surrounded by mountains and water, Vancouver is known as one of the most beautiful cities in the world. The green trees, fresh air and beautiful scenery of Vancouver attract tourists from all over the world to visit. Great events also take place in this city. In 1986, the city played host to the World Expo. And in 2010, the Winter Olympic Games were held here.
这是一篇介绍温哥华的短文，内容要点已经给出，学生写作的时候切入点容易找。要求学生作文涵盖所有要点，并做适当补充或者拓展，使用多种句型和高级词汇，也可以多用一些好的连接词，使文章更为流畅。