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

"No, dear," replied her father, "it's Mother's Day." Immediately the boy had another question. "Oh," he said, "then __________ every other day Father's Day?"