Wuxiisnowamodemcitywithmanyattractions,mostof app...

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Wuxi is now a modem city with many attractions, most of approached within 30 minutes by public transport from the city centre.

A．that B．them

C．which D．whom

考查代词和*结构。根据句意：无锡现在是一个有许多风景名胜的现代化城市，大部分从市中心乘坐30分钟之内公共交通可以到达。根据过去分词approached，可知这里是*结构做状语对上句进行补充，故这里用代词them指代上文的many attractions。故选B。