{#blank#}1{#/blank#}改为{#blank#}2{#/blank#}

  The Earth was{#blank#}1{#/blank#}and{#blank#}2{#/blank#}in the past，but now some parts are{#blank#}3{#/blank#}．We should stop throwing{#blank#}4{#/blank#}into rivers．We should stop cutting{#blank#}5{#/blank#}so many trees and using{#blank#}6{#/blank#}bags．

A．We should do our best every day．

B．It's World Earth Day!

C．What's the date today?

D．That's a good idea．

Kitty：Hi，Peter．{#blank#}1{#/blank#}

Peter：Let me look at the calendar．Oh，it's 22^nd April．

Kitty：Wow!{#blank#}2{#/blank#}

Peter：World Earth Day? I don't know before．What's that?

Kitty：It is to encourage people to save the Earth．

Peter：Oh! You mean we should do something to keep the Earth clean and healthy on this day．

Kitty：Yes，but not only one day．{#blank#}3{#/blank#}

Peter：I think so．Let's do something after school today．

Kitty：Yes．{#blank#}4{#/blank#}

Peter：See you then．

Kitty：See you!

    A．Atlantic Ocean(大西洋)

    B．Indian Ocean(印度洋)

    C．Arctic Ocean(北冰洋)

    D．Pacific Ocean(太平洋)

{#blank#}1{#/blank#}>{#blank#}2{#/blank#}>{#blank#}3{#/blank#}>{#blank#}4{#/blank#}