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

Have you ever felt like jumping out of a plane? Plenty of people have, but _____________ most of them did it after parachutes had been invented.