单项选择题

The hijackers should have been arrested ______ instead of being allowed to leave.

A．on the spot
B．on the side
C．in the sight
D．on the screen
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单项选择题
Would you please ______ the children for me while I'm out
A．take care
B．wait on
C．take charge
D．look after
单项选择题
I hate queuing up for hours ______ in order to get a ticket.
A．in the end
B．without end
C．at the end
D．on end
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