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⑴What must we do before lunch? {#blank#}1{#/blank#}         A. We mustn't smoke.

⑵What mustn't we do in the forest? {#blank#}2{#/blank#}     B. No, you needn't.

⑶Must I finish the work now? {#blank#}3{#/blank#}               C. No, you can't.

⑷What do you need for making tea? {#blank#}4{#/blank#}    D. Some boiled water and tea.

⑸Can I throw the stone in the river? {#blank#}5{#/blank#}      E. We must wash hands.

—{#blank#}1{#/blank#}.

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