A.   B.   C.   D.   E.

A. earth   B. taikonaut   C. space travel   D. airport   E. spaceship

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⑴No littering!{#blank#}1{#/blank#}                             A.

⑵No spitting!{#blank#}2{#/blank#}                              B.

⑶Don't waste food!{#blank#}3{#/blank#}                        C.

⑷Keep quiet!{#blank#}4{#/blank#}                             D.

⑸Watch your step!{#blank#}5{#/blank#}                        E.

⑴I like sweets.{#blank#}1{#/blank#}          A.

⑵A gift for you.{#blank#}2{#/blank#}        B.

⑶We like fireworks.{#blank#}3{#/blank#}     C.