单项选择题

（）to have kept you waiting so long. Oh, never mind. After all, you are here.

A.I am happy 
B.It's a pleasure
C.I am sorry
D.I am welcome

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单项选择题
（）of them thinks that is a good idea

A.Anyone
B.No one
C.None
D.Someone    
单项选择题
（）her and then try to copy what she does.

A.Mind
B.See
C.Stareat
D.Watch
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