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Neverbeforeingreaterneedofmodernpublictransportthanitistoday.A.hasthiscitybeenB.thiscityhasbeenC.wasthiscityD.thiscitywas为什么选A,不选C?

题目详情
Never before _______ in greater need of modern public transport than it is today.
A.has this city been
B.this city has been
C.was this city
D.this city was
为什么选A,不选C?
▼优质解答
答案和解析
never before往往用完成时,如I have never seen a better film before!