介词是英语中一类非常重要的词类，在英语学习个使用中非常活跃!典型例句:1.He prefers staying at home watching TV to walking around for several hours in the shopping centre.
First， put a spoon of cheese on a piece of bread. Then cut up a green pepper and an onion. Add these to the bread. Next， put some mushrooms and 2 pieces of beef on the bread. Put two spoons of relish on the beef. Finally， the other piece of bread on the top.
主要单词: museum博物馆 bookstore书店 cinema电影院 turn 转弯 hospital医院 left向左 post office邮局 science科学 right向右 straight笔直地 crossing十字路口。
