The dog stopped____  at strangers when they ran away. (bark)
The ____  people think red, green and white are Christmas colors. (west)
Every day the chimneys of ____  pour a lot of smoke to the air to pollute it. (factory)
I think you may be ____  in our new computer games. (interest)
I often make chocolate cake by ____ . (me)

下列被列为世界遗产的聚落是（　　）

    We often dine out with others, but do you know some basic etiquette (礼节)? If you behave well at the table, it will make your partners happy. But if you don't know how to behave yourself, you will feel embarrassed. Here are some tips for the table etiquette.

    When helping a woman pull her chair to the table, hold it and guide it. Don t shove(碰撞)it against the back of her legs.
     If you're seated at a table with eight or fewer guests, wait for everyone to be served and for the hostess(女主人) to begin eating before you dig in. At a long banquet table, it's OK to start when several people are seated and served.

    If you prefer not to have wine while dining out, don't turn your glass upside down, and don t make a big deal of saying you don't drink. Simply place your fingertips on the rim(边缘) of the glass and say" Not today, thanks."

    When you excuse yourself to go to the restroom, just say" Please excuse me."

    When out with friends or family—even at a fancy restaurant –it's OK to ask for your leftovers(吃剩的饭菜) to be wrapped. But don't do it at a business lunch or dinner.

Information Card

已知圆C:${\left(x-4\right)}^2+y^2=4$,从动圆M:${\left(x-4-7\cos \theta \right)}^2+{\left(y-7\sin \theta \right)}^2=1$上的动点P向圆C引切线，切点分别是E,F，则$\overrightarrow{CE}·\overrightarrow{CF}$的最小值（ ）