问题描述：
高中英语单选
If you ___ wait over there for a minute,Mr.Smith,I'll tell our manager you've arrived.
A.must B.should C.will D.can
CD有什么区别?
If you ___ wait over there for a minute,Mr.Smith,I'll tell our manager you've arrived.
A.must B.should C.will D.can
CD有什么区别?
问题解答：
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