单项选择题

Mr. Smith asked his secretary to ______ a new paragraph in the annual report she was typing.

A．invade
B．install
C．insert
D．inject
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单项选择题
The defense lawyer was questioning the old man who was one of the ______ of the murder committed last month.
A．witnesses
B．audiences
C．viewers
D．observers
单项选择题
Some psychologists argue that the traditional idea spare the rod and spoil the child is not rational.
A．helpful
B．kind
C．sensible
D．effective
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