Whose           is this?（    ）

① {#blank#}1{#/blank#}     A. book    B. park        C. boat     D. go

② {#blank#}2{#/blank#}     A. yesterday     B. last Monday   C. tomorrow  D. last week

③ {#blank#}3{#/blank#}    A. went     B. wash   C. clean  D. watch

④ {#blank#}4{#/blank#}    . A. football     B. sports      C. basketball     D. ping-pong

⑤{#blank#}5{#/blank#}    A. storybook    B. magazine     C. visit     D. book

—What animals are the largest animals on the earth?  

—{#blank#}1{#/blank#} are the largest animals on the earth.