是：
i remember my first trip to the taishan mountain as if it were yesterday.
4.概括性的开头
即对要在文章中叙述的人或事先作一个概括性的介绍。如“the happiness of reading books”（读书的快乐）的开头：
people often say that gold and silver are the most valuable things in the world. but i say that to read books is more valuable than anything else， because books give us knowledge and knowledge gives us power.
5.介绍环境式的开头
即开头利用自然景物或自然环境引出要介绍的事物。如“an accident”（一场事故）的开头是：
it was a rainy and windy morning. the sky was gloomy， the temperature was low， and the street was nearly empty. i was on my way back to school. suddenly， a speeding car came round the corner.
6.交待写作目的的开头。
在文章的一开头就交待写作目的，如通过文章要表扬谁，批评谁，或说明一个什么问题等。如 “pollution control” （控制污染）的开头：
in this article i shall draw your attention to the subject of pollution control.