Пре­об­ра­зуй­те, если это не­об­хо­ди­мо, слово THEY так, чтобы оно грам­ма­ти­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

Even if you come to our Summer school only to study English, your visit to the UK would not be complete without a trip to London. Our students will have time to see the sights and absorb the atmosphere as they spend ______ last night in this fabulous city.