贵州董酒价格:请英语专家帮忙

我是英语白痴，书上改错已经有正确答案，并找出句中的错误，但我不知道如何改正，请专家帮忙，谢谢了
三、改错
41 Nancy had a great deal of trouble to concentrate on her work because of the noise in the next room.
to concentrate on错在哪里？如何改正？
42 I remember to see that American naturalist two years ago in India at the dinner party given by Mr. and Mrs. Wynnes.
to see错在哪里？如何改正？
43．No matter whatever happens, we’re determined to do our best and make the experiment a success．
whatever happens错在哪里？如何改正？
44．I can't get my car started now ．Something must have gone wrongly with the engine．
gone wrongly错在哪里？如何改正？
45．Jeremy is such a careless person that he has five wallets sto1en by pickpockets this year．
has错在哪里？如何改正？
46．Don’t take for granted that all those who score high in the entrance examinations will
prove to be the most competent at college．
take for granted错在哪里？如何改正？
47．The elderly lawyer thinks it good for his health to walk up the stairs to his office on the fifth．floor instead of to take the elevator(电梯)
to take the elevator错在哪里？如何改正？
48．Most of the freshmen in our college．Have made for more greater progress in their study of English than we first expected．
for more greater错在哪里？如何改正？
49．Dr．Nolen was honest enough to admit to make errors in judgment on more than one occasion．
to make错在哪里？如何改正？
50．Our history professor is such a knowledgeable person that it seems there isn’t nothing which
he does not know．
nothing错在哪里？如何改正？