单项选择题

The sixth generation computers with artificial intelligence ______ and perfected now.

A. developed


B. will have been developed
C. have developed


D. are being developed
<上一题 目录 下一题>
热门 试题

单项选择题
He ______ with Smith at least four times in the past three years.
A. has been seen to meet

B. was seen to meet
C. had been seen meeting

D. is seen meeting
单项选择题
I don’t think it advisable that Tom ______ to the job since he is too young.
A. is assigned


B. be assigned
C. will be assigned


D. has been assigned
相关试题