6.stereotype n. 陈规，老套，规定模式

　　7.stern 严格的，苛刻的，严厉的

　　Stern , strict, severe

　　例句5.Stern rebuke,stern treatment—the treatment is very demanding

　　8.steward n. 乘务员

　　stewardess n. 女乘务员

　　host—hostess,act—actress,

　　waiter—waitress, prince—princess

　　9.stiff a. 硬的，僵直的；a. 生硬的，死板的 hardened, rigid

　　例句6.Shoes are often______ when they are new.

　　A. staff B. stuff C. stiff D. stuffy