——Must I work out the problem right now? ——Yes, you _______. It's very serious.

题型：单选题题类：模拟题难易度：普通

——Must I work out the problem right now?
——Yes, you _______. It's very serious.

A、can B、must C、may D、should

举一反三

—______. I've done that.

─ No, It be her. She is wearing a white dress today.

一 You must it because it is the place where you were born.

—Sure, but you finish your homework first.

— You _______ go if you have finished your homework.

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