单项选择题

In ______ of emergency, all hotel guests are reminded to use the emergency stairs rather than the elevator.

(A) case
(B) event
(C) situation
(D) condition
<上一题 目录 下一题>
热门 试题

单项选择题
Having used up her sick leave while in the hospital, Mary had no option but ______ personal leave instead.
(A) using
(B) use
(C) to use
(D) by using
单项选择题
The purpose of this system is ______ trade flow as freely as possible, making sure that there are no undesirable side-effects.
(A) help
(B) to help
(C) helping
(D) in helping
相关试题