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Traveling 1______ is very popular nowadays. You can drive as slowly or as fast as you like.
Traveling 2______ gives you the opportunity to watch beautiful sights from the windows of the carriages, to read your favourite book or just to rest.
Many people like to travel 3______. It is pleasant to sit on the deck, watching the ships and waves.
But the fastest and most comfortable is the traveling 4______.
by car
by train
by sea
by plane