take up用法很多，可以表示"开始从事"如 He took up Spanish while in Spain. (当他在西班牙的时候，他开始学习西班牙语。) ; "吸收(液体);溶解(固体)"如Blotting -paper takes up ink. (吸墨纸吸收墨水。 )，还有"占据，接受，拿起，改小"等用法，例句中是讨论的意思，相当于 go down to，不过 go down to中的 to是介词，后面接v-ing形式。 http://www.kekenet.com/kouyu/201604/434132.shtml
我的逆反心理 My Negative Mentality:本文由作文地带整理分享，希望各位网友喜欢。
My negative mentality is very serious these days. I like to go against my mother’s will. For example, my mother asks me to do homework first when I go ... http://www.joozone.com/gaokao/803544.html
保护动物Protecting the Animal:本文由作文地带整理分享，希望各位网友喜欢。
As the development of economy, some people make the high profit at the cost of damaging the balance of the environment, now the weather has change, it become... http://www.joozone.com/gaokao/803546.html