(travel) ______ by train is much cheaper than by air.Traveling本题考查非谓语动词。动名词可以作主语

游客2023-09-25 13

问题 (travel) ______ by train is much cheaper than by air.

选项

答案 Traveling

解析本题考查非谓语动词。动名词可以作主语, 故travel应变成traveling。

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