单项选择题

Unless ______ by credit card, please pay in cash.

A. pay
B. is paid
C. paying
D. paid
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单项选择题
The scenery of the Way-lee-way had charmed the travelers with its mingled ______ and grandeur and filled them with admiration and astonishment.
A. amenity
B. equipment
C. convenience
D. appliance
单项选择题
It was not until midnight ______ the snowcapped peak.
A. did they sight
B. that they did not sight
C. that they sighted
D. did they not sight
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