① He is talking in the library.  {#blank#}1{#/blank#}     A.  Keep your desk clean.

② We are playing a game.  {#blank#}2{#/blank#}     B.  Keep to the right.  

③ She is colouring at her desk.  {#blank#}3{#/blank#}     C.  Take turns.

④ They are walking on a bridge.  {#blank#}4{#/blank#}     D. Talk quietly.

{#blank#}1{#/blank#} 

⑴{#blank#}1{#/blank#} A. young B. tall C. old

⑵{#blank#}2{#/blank#} A. small B. big C. than

⑶{#blank#}3{#/blank#} A. meter B. hall C. short

⑷{#blank#}4{#/blank#} A. me B. you C. him

⑸{#blank#}5{#/blank#} A. long B. taller C. older