选出每组中不同类的一项。① {#blank#}1{#/blank#}A. million B. kilometre C. hundred D. thousand
② {#blank#}2{#/blank#} A. really B. quickly C. friendly D. slightly
③ {#blank#}3{#/blank#} A. canteen B. playground C. library D. summer
④ {#blank#}4{#/blank#} A. teacher B. Maths C. Chinese D. English
⑤{#blank#}5{#/blank#} A. fever B. stomachache C. throat D. headache