TheChinesemainlandhas157billionairesasof2013，

問題詳情：

The Chinese mainland has 157 billionaires as of 2013，_________second in the number of

    billionaires worldwide．

    A．having ranked    B．ranked    C．to rank    D．ranking

【回答】

D

知識點：非謂語動詞

題型：選擇題