单项选择题

You ______ her in her office last Friday; she's been out of town for two weeks.

A．needn't have seen
B．might have seen
C．must have seen
D．can't have seen
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单项选择题
That battle is of great significance when viewed in the ______ of the progress of the war.
A．notion
B．perspective
C．concept
D．outlook
单项选择题
They stood gazing at the happy ______ of children playing in the park.
A．perspective
B．view
C．landscape
D．scene
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