几道英语语法题,1.短文改错题Allow me,first of all,on behalf of (代表)my tea

几道英语语法题,
1.短文改错题
Allow me,first of all,on behalf of (代表)my teachers
and classmates give a warm welcome to all of 76.
you from London.It gave us a great pleasure 77.
to have you in our school for a brief visit.You will be
glad to see how well we Chinese students are getting 78.
along with their English learning.We think it 79.
bridge to the friendship between us and the people 80.
throughout the outside world.But,you know,there is 81.
still some students,most of which are boys of science,82.
learn English with much trouble.So,we hope you would 83.
give us some more advice on the language study.84.
Let me wish you a pleasant stay here.May your visit goes 85.
successfully.
76题,答案是把to去掉?为什么?看不懂什么用法.
82题,答案是把which改成whom,我想问可不可以改成them?为什么?
2.Dear Kang Li,
I haven't heard you for a long time.How 76._______
are you I had just finished the exams.Now I'm 77._______
glad I have time to write for you.Our teacher 78._______
tells us that China is a big country has the 79._______
most population in the world.It's on the other 80._______
side of the world.Now the sun is shining bright 81._______
here and perhaps you're sleeping in the dark 82._______
night .I wish to know anything more about the 83._______
Chinese way of living.I wonder at if you can 84._______
tell me about it in next letter.Please write soon.85._______
79题,答案是在has前面加that或which,我想问加and不行吗?为什么?
3.我想问一下express是及物动词,后面可以接that从句吗（好像不可以）?为什么?
4.一句翻译题：有多条海上航线可以让你在中国沿海的城市之间旅游.
请翻译后解释下语法用法,如果可多种翻译更好!

1、76题应该是答案错了.去掉to完全说不通,介词表方向.该有to
2、不可以改成them.你可以看一下,改成了them的话是不是变成两个句子了?这时候必须也加上and才能对.我这样改也是把主从关系（定语从句）变成了并列关系了.其实也是歪曲了原来句子的意思的.因此最好不要这么改.
3、可以,但不够好.因为加and的话,一般还要加一个it··就是and it has the`````不然就会很别扭,你念两遍就能发现了.
4、express及物,当然可以从句,···及物接的是名词,而that也可以接名词性从句,有何不可?
5、不知道你们想考哪个知识点,我直接翻译了：
On the sea,there are many ship routes which enable you to travel across many cities on the sea coast of China.