2道BEC中级改错题,我的改错非常不好,根本原因是语法不好,每次改错的12题,我得错一半.哎 我也不知道该怎么办,从上中

2道BEC中级改错题,
我的改错非常不好,根本原因是语法不好,每次改错的12题,我得错一半.哎 我也不知道该怎么办,从上中学开始,英语课都没听过,到高三的时候才开始猛背单词.语法真的是一塌糊涂.
关于这篇改错,我还有几个地方不懂,这些问题估计在别人看来都是再简单不过了吧.真是有点不好意思了
0 Regular meetings with clients are important to a healthy collaboration.They
00 may be set up by the client,for example to review with the progress of current
34 projects,to give new instructions that may have lead to a contract variation
35 or to discuss any concerns.The client meeting which can also be arranged
36 by you or another member of your company to attract from new business,to
37 address a problem unless that needs to be solved or to give an update or status
38 report on current business ventures.Your part is in these meetings will dictate
39 the kind of information you need and how you should prepare for them.If you
40 will be responding to questions put by your client,the material you present
41 should deal in specifically with the request that was made.The meeting should not
42 only move off the agenda without the permission of the person you are meeting.
43 If you have prepared properly,you should be able to anticipate both questions and
44 to respond properly.If you are put on the spot and asked for details you do not
45 have,respond honestly - do not speak about matters as you are not familiar with.
正确答案我都知道,可是我有两个地方不明白.
40：我觉得responding 后面的TO为什么不可以去掉啊?
44：.questions and to respond properly.这个TO为什么也不能去掉?