单项选择题

______whether robots will one day have vision as good as human vision.

A．What is not yet known
B．It is not yet known
C．As is not yet known
D．This is not yet known
<上一题 目录 下一题>
热门 试题

单项选择题
______on the grassland, I watched the clouds and listened to the singing of the birds.
A．Lying
B．Laying
C．Lied
D．Laid
单项选择题
The news______banks will charge higher interest comes out in today’s TV report.
A．which
B．whether
C．what
D．that
相关试题