Never before _____ in greater need of modern public transport than it is today.

A. Beijing has been 　
B. has Beijing been
C. was Beijing
D. Beijing was
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科目：高中英語 來源：0103 月考題 題型：單選題

Never before _____ in greater need of modern public transport than it is today.
[     ]
A. Beijing has been 　
B. has Beijing been
C. was Beijing
D. Beijing was

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