单项选择题

At present much more stress bas been laid ______ law and order by the local government.

A．onto
B．at
C．on
D．to
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单项选择题
The fifth generation computers, with artificial intelligence, ______ and perfected now.
A．developed
B．have developed
C．are being developed
D．will have been developed
单项选择题
There are some faults which men readily ______ , but others not so readily.
A．acknowledge
B．admit
C．confess
D．concede
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