单项选择题

Dozens of scientific groups all over the world have been __________ the goal of a practical and economic way to use sunlight and split water molecules.

A．pursuing
B．attaining
C．reaching
D．chasing
<上一题 目录 下一题>
热门 试题

单项选择题
The government calls on young persons' __________ service to the national defense.
A．valuable
B．passionate
C．virtual
D．voluntary
单项选择题
My car is always breaking down, but I don't know enough about __________ to be able to fix it my self.
A．mechanics
B．mechanism
C．mechanic
D．medicine
相关试题