单项选择题

This is the (longest)flight I (have ever taken). By the time we get to Los Angeles, we (had flown) (for)13 hours.

A．longest
B．have ever taken
C．had flown
D．for
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单项选择题
Though the doctors tried everything they couldn't save him from the deep ______wound.
A．shot
B．punch
C．pinch
D．stab
单项选择题
As the firm's business increased they ______more and more employees.

A．took up
B．took in
C．took after
D．took on
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