一,1,Mary has never been to America, has she? (逗号前面never表否定,逗号后应改为否定,另外我觉得这句话应该用完成时态)2, We have already used up the money. (use up 是“用光”的意思)3,I think she is speaking to the boss. (speak to sb)4, I am afraid that I can't hear you. (be afraid + 从句,另外这句话应该是“我恐怕听不见你”吧,所以把can改成了can't)二,1, Amy is not a player of our school volleyball team.2, What else do you want?3, He danced a lot at the evering party last night.4, I am confident that we will stay here. 或 I am sure that we will stay here.--------------------补充5,He said that they did not need to have a rest.