69. With the guide leading the way, the visitors were able to travel through the forest not by air b

题目简介

69. With the guide leading the way, the visitors were able to travel through the forest not by air b

题目详情


69. With the guide leading the way, the visitors were able to travel through the forest not by air but _____ foot.
A.byB.onC.inD.with
题型:单选题难度:偏易来源:不详

答案

B

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