Units11-13,提纲导学，自主学习,polite-(反）_ mystery(n)-(adj)_ gradually_ crowd(v)_(n)_(adj)_反)_ most大部分-（adv)_ proper_ normally_ special(特殊的）-（特定地，明确地_ safe(adj)-(n)_(adv)_ organize(v)组织-（adj)_ science(自然）-（科学家)_(科学的）_ fair公平的-（反）_ true-（n)_ danger(危险）-（危险的）_(濒临灭绝的_ directly_,impolite,mysterious,逐渐地,拥挤,人群,crowded,uncrowded,mostly,合适的，恰当的,通常,specically,safety,safely,organized,scientist,scientific,unfair,truth,dangerous,endangered,直接地,.decide的用法 please的用法 闲逛 sale的用法 打扮成小丑 遮挡 alone与lonely 旨在 为了做某事 假装做某事 对放松 介意做某事 拜访 宁愿做而不愿做 plan的用法 make的用法 （特地）不怕麻烦做某事 familiar的用法 使某人感到宾至如归 use的用法 事实上（3） pick up 的意思 充满（2） 取决于,Take the escalator to the second floor. That is a good place to hang out. I live right next to a supermarket ,Its very convinient. Asking for information or help is a very common and necessary activity. What are you suposed to do when you meet for the first time.,We never visit a friends house without calling first. You can imagine how different the table manners here are from ours. When prices are listed,you can go to the store with the lowest price. Different people have very different thoughts on this subject.,