“Thank you” is widely{#blank#}1{#/blank#}in a modern society. It is a very good manner. You should say “Thank you”{#blank#}2{#/blank#}others help you or say something kind to you. For example, when someone{#blank#}3{#/blank#}the door for you, when someone says you have done your work well, when someone says you have{#blank#}4{#/blank#}a nice shirt, or your city{#blank#}5{#/blank#}very beautiful, you should say “Thank you”. “Thank you”is used not only between friends,{#blank#}6{#/blank#}between parents and children, brothers and sisters, husbands and wives.

    “Excuse me”is{#blank#}7{#/blank#}short polite usage. We use it the same as “Thank you”. When you hear someone say so behind you, you'll get to know that somebody wants to walk past you without{#blank#}8{#/blank#}you. It is not polite to interrupt (打断) others while they are{#blank#}9{#/blank#}. If you want to have a word with one of them, please say “Excuse me”{#blank#}10{#/blank#}, and then begin to talk. You should also do so when you want to cough or make any unpleasant noise before others. Let's say “Thank you” and “Excuse me” on the right occasion.

Dear Bill,

    I'm glad {#blank#}1{#/blank#} your letter. Thank you for {#blank#}2{#/blank#} for the weather and my health. But I am sorry to tell you that I have to stay at home because of the heavy fog and haze(雾霾).

    Since the winter last year, the fog and haze {#blank#}3{#/blank#} a lot of times. It has done great harm to our daily life. Many traffic accidents {#blank#}4{#/blank#}. More and more people were ill and the doctor said the serious disease{#blank#}5{#/blank#}by the fog and haze, quite a lot of flights have to be {#blank#}6{#/blank#} off , and a great number of people have to stay at home for fear of the poisonous(有毒的) air.

    According to the Chinese Academy of Science, driving cars and {#blank#}7{#/blank#} coals are two main reasons. People have been told: don't do outdoor sports. If you have to go out, wear a mask(口罩); wash your face and clean your nose as soon as you get home.

    People {#blank#}8{#/blank#} the importance of protecting environment. The government suggest everyone{#blank#}9{#/blank#} to work or school with the public traffic, such as the bus and the underground. Also we {#blank#}10{#/blank#} more trees.

Yours,

Li Hua