单项选择题

You will be late______ you leave immediately.

A．unless
B．until
C．if
D．or
<上一题 目录 下一题>
热门 试题

单项选择题
______terrible weather we've been having these days !
A．What
B．What a
C．How
D．How a
单项选择题
Not until the early years of the 19th century ______what heat is.
A．man did know
B．man know
C．didn't man know
D．did man know
相关试题