[文法] 關代的文法題

[adrainne (adrainne)]

the leopard seal is the only pinniped _____ preys on penguins and other seals

(a)that normally

(b)of which in normally

(c)normally

(d)that is normaly


答案是b

但是不太清楚

為什麼是這個選項

請高手解釋一下> <

謝謝

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