⑴—What colour is the book?—It' s blue.{#blank#}1{#/blank#}      A.

⑵Look at the book. It's black.{#blank#}2{#/blank#}                        B.

⑶—What' s this?—It's a brown book.{#blank#}3{#/blank#}             C.

⑷May I have a purple book, please?{#blank#}4{#/blank#}               D.

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.