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
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单项选择题
Consumers should do ______ than simply complain about the poor quality of goods.
A．much less
B．some more
C．far less
D．far more
单项选择题
These plastic flowers look so ______ that many people think they arc real.
A．beautiful
B．natural
C．artificial
D．similar
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