[文法] 托福 one person of ten?

[jetbike (jb)]

請教一下各位這題托福文法題,

原題目是選擇題,

我想請問要如何把錯的地方改對?

About one person on ten is a potential sufferer of hay fever.
                 ^^

選項是 on 文法不對,

請問要改成什麼才對呢?是 of 嗎?

謝謝大家.

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