单项选择题

Great changes （） in our country these few years.

A．have been taken place
B．has taken place
C．has been taken place
D．have taken place

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单项选择题
During my visiting there, I （） new shopping centers being built.

A．saw
B．see
C．has seen
D．am being seen
单项选择题
I know some people who （） to visit Wuhan.

A．want
B．wants
C．has wanted
D．have been wanted
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