单项选择题

Never _______ to the U. S. A..

A．I have been
B．do I have
C．have I been
D．have I do
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单项选择题
Mary asked John if it was the place _______ he bought the flowers.
A．what
B．that
C．which
D．where
单项选择题
_______ breaks the law will be punished sooner or later.
A．Who
B．Whoever
C．Someone
D．Anyone
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