单项选择题

All staff members are reminded that you should not use the executive restroom （） you have written authorization to do so.

A.for
B.unless
C.without
D.although

<上一题目录下一题>

热门试题

单项选择题

Employees attending the writing seminar are expected to practice imaginative and （） writing as well as develop their technical writing skills.

A.detective
B.negative
C.descriptive
D.cooperative

单项选择题

In order to be registered for our 5-year warranty, please send us the following postage-paid registration form （） 7 days of purchase.

A.by
B.until
C.within
D.before

相关试题