Нужно употребить во в косвенной речи
He doesn't know (Who was the nineteenth president of the United States?). He isn't sure (When did the Civil War end?), He doesn't remember (When did California become a state?), He has forgotten (Where was George Washington born?). He can't remember (How many people signed the Declaration of independence?). He doesn't know (Where was Abraham Lincoln assassinated?). He has forgotten (Why was Washington chosen as the capital?). And he has no idea (What did Alexander Graham Bell invent?).

olenkadergunov    2   14.05.2020 15:50    8