单项选择题

Busy ______ he is, he can fulfill the task ahead of schedule.

A．because
B．as
C．no matter how
D．although
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单项选择题
There was a terrible ______ as the crowd waited to hear who had been killed in the accident.
A．impression
B．diffusion
C．tension
D．stimulation
单项选择题
______ had Jane reached school than the bell rang.
A．Hardly
B．Scarcely
C．Rarely
D．No sooner
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