单项选择题

As he delayed his departure on account of something important, by the time he arrives in Beijing, we ______ here for two days.

A．have been staying
B．have stayed
C．shall stay
D．will have stayed
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单项选择题
He didn t have time to read the report word for word: he just ______ it.
A．skimmed
B．observed
C．overlooked
D．glanced
单项选择题
While crossing the mountain area, all the men carried guns lest they ______ by wild animals.
A．should be attacked
B．had been attacked
C．must be attacked
D．would be attacked
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