1.The fifth generation computers,with artificial intelligence,______ and perfected now.A:developed B:have developed C:are being developed D:will have been developed

问题描述:

1.The fifth generation computers,with artificial intelligence,______ and perfected now.
A:developed
B:have developed
C:are being developed
D:will have been developed

C:are being developed
now应该使用现在进行时,同时计算机时被开发,应该用被动语态