单项选择题

They ______ to enter the building by the back door; however, the back door was locked.

A. weren't supposed
B. wouldn't be supposed
C. were supposed
D. would be supposed
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单项选择题
Californians and New Englanders speak the same language and ______ by the same federal laws.
A. stand
B. conform
C. abide
D. sustain
单项选择题
Our modem civilization must not be thought of as ______ in a short period of time.
A. being created
B. to have been created
C. having been created
D. to be created
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