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题型：单选题题类：模拟题难易度：普通

— What's mother doing, Jim?
— I don't know. She ________ Zhou Libo's show at her bedroom.

A、may be watching B、must be watching C、is watching D、should watch

举一反三

Someone is knocking at the door. It my sister. It's time for her to be back.

The math test is too difficult for them，so they finish it．

The blue coat ________ be Tony's.He never wears blue clothes.

—Could you find_______ ways to work out this problem, Jim?

—Yes, I_______.

—I have a cold. You are near the window._____ please close it?

—OK. You should look after yourself well.

Nobody {#blank#}1{#/blank#}live without air. (情态动词)

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