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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
29
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
时态题。根据最后一个分句的结构可以判断,and连接两个并列谓语动词,且perfected是及物动词的被动语态,所以所选动词一定是被动结构,排除A 、B 。选项D 表示的是将来时,与原题中的时间状语“now”不符,所以正确答案为C 。
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专业英语四级
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