语法与词汇9.The airlines charge half-price for the students._____, I've already bought my ticket to New York.
【正确答案】
B
【答案解析】副词形似义异辨析。incidentally=by the way表示“顺便说，顺便提一句”，如：So I agreed to lend him the money, which incidentally he still hasn’t paid me back．于是我便同意将钱借给了他，顺便说一下，这钱他至今未还。