Traveling . . . . . . . . air is faster than traveling . . . . . . . . sea.
A. on, on
B. by, by
C. in, on
D. by, at
Answer: Option B
Solution (By Examveda Team)
When you are talking about general ways to travel, use the preposition "by". For example, you can travel by train, by car, by bus, by truck, by plane, by motorcycle, by helicopter, by air, by sea or by boat.This Question Belongs to Competitive English >> Preposition
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