listen to the material carefully,although it is difficult and sometime you can't write down the correct answer.As long as you have tried,whatever you write down will be the harvest of yours.You should believe that only by accumulating little by little could you learn English welll.so come on.
One of the late President John Kennedy's closest aides, Theodore Ted Sorensen, _____________________. He was a key associate of Kennedy, working closely with the late president when he made some of his most iconic speeches to the extent that some scholars raised the question of who wrote what.