A-A+
The fifth generation computers with artificia
问题详情
The fifth generation computers, with artificial intelligence, ______ and perfected now.
A．developed
B．have developed
C．are being developed
D．will have been developed
参考答案
正确答案：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 。
