— Listen! Helen is singing in the classroom.—It _______ be Helen. She has gone to Shanghai.

题型：单选题题类：模拟题难易度：普通

— Listen! Helen is singing in the classroom.
—It _______ be Helen. She has gone to Shanghai.

A、mustn't B、may not C、can't D、should

举一反三

—No, you ______. You can give it to me tomorrow.

—Yes, I can.

They {#blank#}1{#/blank#} sing {#blank#}2{#/blank#} dance.

I {#blank#}1{#/blank#} find the way to the hospital. {#blank#}2{#/blank#} you show me the way?

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