单项选择题

He ______ working till he was seventy years old.

A．kept up
B．kept on
C．kept to
D．kept out
<上一题 目录 下一题>
热门 试题

单项选择题
You can't hear what I'm saying ______ you stop talking.
A．only if
B．unless
C．lest
D．except that
单项选择题
I ______ get this done immediately or it will be too late.
A．must
B．can
C．may
D．might
相关试题