(W) Since 1992 when the Main-Danube canal opened, linking the Rhine and Danube Rivers by way of the Main River, barges have been able to go all the way across Europe, from the North Sea to the Black Sea. Now, a torn- operator, Uniworld of New York, plans to take up to 150 passengers next summer on the new Wolfgang I and II on each of two 22-night trips it calls the Ultimate Grand Cruise. On June 27^th, the vessels will leave Amsterdam headed for Constanta in Romania, passing through or along, Germany, the Czech Republic, Austria, Slovakia, Hungary, and Bulgaria with stops along the way. On July 17^th, the vessels will retrace the route. This luxury cruise will be offered on a first come, first served basis, and participants will be allowed to join only one of these cruises -> Đáp án B (dòng 3, 4)
Câu hỏi: Uniworld dự định có bao nhiêu chuyến đi?