[文法] are essential for 錯在哪??

[lovewin (思念天上的你們)]

III. Error Correction

B  28. Having computer skills are essential for a college freshman, and I
                              ________________
        (A)                         (B)

      have decided to learn how to use a computer.
         (C)              (D)


請問B選項"are essential for"是哪裡文法錯誤呢??

謝謝


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→ BLUEMILTON:is essential for  動名詞開頭這邊當單數的主詞
推 twentyone:IS
→ twentyone:指的是HAVING COMPUTER SKILLS這"一件事"
→ lovewin:感恩，我懂了^^