问题补充：
The new means of transport in this city, so whether it will work out remains to be seen.
A. have never tried
B. has never tried
C. have never been tried
D. has never been tried
答案：
A. have never tried
B. has never tried
C. have never been tried
D. has never been tried
解析：词义辨析.tried,try的过去时态,意思是尝试/努力.tired形容词意思是累的,疲劳的,根据题意,这个城市中从来没有尝试过新的运输方法,因此它是否这能否实现还有待观察.这里新的运输方式是try的逻辑宾语,故用被动语态,选D.
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