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The fifth generation computers, with artificial intelligence, ______ and perfected now.
The fifth generation computers, with artificial intelligence, ______ and perfected now.
admin
2010-04-24
58
问题
The fifth generation computers, with artificial intelligence, ______ and perfected now.
选项
A、developed
B、have developed
C、are being developed
D、will have been developed
答案
C
解析
根据题干,所填空的时态应是被动语态,所以排除A 和B 。句尾的now提示应选择现在进行时的被动式,故答案为C 。
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专业英语四级
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