单项选择题

Not once ______ your sentence correctly.

A．you have copied
B．did you have copied
C．have you copied
D．have you been copied
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单项选择题
The magnificent museum is said ______ about a hundred years ago.
A．to be built
B．to have been built
C．to have built
D．to have being built
单项选择题
He was fully ______ of his own shortcomings.
A．sensitive
B．sensible
C．serious
D．sincere
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