单项选择题

I hadn't seen him for years, but I______his voice on the telephone.

A．realized
B．recognized
C．heard
D．discovered
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单项选择题
Buses stop at every stop to let off and______the passengers.
A．pick up
B．get on
C．let up
D．take on
单项选择题
The captain______an apology to the passengers for the delay caused by bad weather.
A．made
B．said
C．put
D．passed
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