单项选择题

The UFO phenomenon is not new to us, but scientists are still not able to offer any______ explanations.

A．specific
B．rational
C．virtual
D．literal
<上一题 目录 下一题>
热门 试题

单项选择题
Mr. Jones holds strong views against video games and ______the closing of all recreation facilities for such games.
A．assists
B．acknowledges
C．advocates
D．admits
单项选择题
The scientist's discovery will have a______ influence on mankind.
A．prominent
B．promising
C．profound
D．productive
相关试题