单项选择题

It ______ a lot ______ we can develop something to substitute for petrol.

A．occurs; whether
B．matters; whether or not
C．happens; even if
D．minds; if or not
<上一题 目录 下一题>
热门 试题

单项选择题
We ______ each other the best of luck in the examination.
A．wished
B．hoped
C．expected
D．wanted
单项选择题
If Tim keeps working like this, he'll ______ sooner or later.
A．break down
B．give
C．get down
D．hold on
相关试题