If you feel tired after hard work, a good place for a rest is Dalian. Unlike most people travelling to Dalian by train or air, this time you can have a new way to get there: driving your own car. Day 1 Start your trip at about 2:45 pm in Beijing. It takes three hours and fifteen minutes to drive to Tanggu Port. The ships between Tanggu Port and Dalian Port have drawn more and more visitors, and they are so large that cars can park in them. Day 2 The ship arrives at Dalian Port at about 8 am. If the weather is nice, you can enjoy the sunrise(日出). After checking in at the hotel, you can spend the rest of the day visiting some interesting places. Day 3 The last day will give you a break at the indoor swimming pool(室内游泳池)in the hotel. Seawa-ter comes into the pool every day. So even on cold days, your dream(梦想)of swimming in sea-water can come true. Going back to Beijing, visitors need to get on the ship. It leaves at 6 pm. Day 4 The ship returns to Tanggu Port at around 6 am. In another three hours, you can be back in Beijing.
【答案解析】解析：句意：在哪一天可以在海水中游泳?细节题。从原文第三天所述的“The last day will give you a break at the indoorswimming pool”以及“your dream of swimming in seawater cancome true”，可知在海水中游泳是第三天发生的事。