单项选择题

John felt a little disappointed and was about to leave, ______ something occurred which attracted his attention.

A．while
B．when
C．until
D．unless
<上一题 目录 下一题>
热门 试题

单项选择题
According to American federal government, residents of Hawaii have the longest life ______: 77.2 years.
A．rank
B．scale
C．span
D．scope
单项选择题
They stayed up late trying to ______ out a way to solve the problem.
A．let
B．give
C．knock
D．figure
相关试题