请教几道专四语法题1、"there is no getting over the difficulties" 这句话是什

请教几道专四语法题
1、"there is no getting over the difficulties" 这句话是什么意思？
2、"It seems that she was there at the conference"的意思和
She seems to have been there at the conference.
She seemed to be there at the conference.
这三句话表达的意思有什么区别？
3、It was _______ we had hoped.
为什么答案是 as much of a success as 而不能选 more a success than
4、I went there in 1984,and that was the only occassion when I ______ the journey in exactly two days.
为什么答案是was able to make 而不能选 could make
5、I apologize if I _____ you,but I promise that it was not on purpose.
为什么答案是 had offended 而不是 have offended