单项选择题

"We' re late and the play has started."" I wonder how long ago______."

A．did it begin
B．it began
C．was it beginning
D．it has begun
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单项选择题
It is human nature to think back to Golden Age______ one' s country was strong and respected.
A．when
B．provided
C．as
D．unless
单项选择题
The new edition of the encyclopedia______ many improvements, which is the result of the persistent effort of all the compilers.
A．embedded
B．embodied
C．enchanted
D．enclosed
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