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    【题目】Which of the following sentences is RIGHT?

    A. I am convenient to go there by train.

    B. I go there by train at convenience.

    C. It is convenient for me to go there by train.

    D. It is convenience for me to go there by train.

    【答案】C

    【解析】句意：我坐火车去那很方便。convenient的主语不是人，常用于it is convenient for sb.to do sth.某人做某事很方便，it是形式主语不定式是真正主语，故选C.

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