13. We referred to some photos of previous exhibitions on the computer.
我们在计算机里找到一些过去参展的照片作参考。
还能这样说：
We searched our computer to refer to some photos of previous exhibition.
We found some photos of previous exhibitions in the compuer for reference.
应用解析：
refer to sb. 提到某人，涉及到某人，与某人有关；
refer sth. back to sb. 将退给送件人予以澄清；
refer oneself to 依赖

14. We need fix a time for the exhibition.
我们应该为举办展会挑个时间。
还能这样说：
We need choose a right time for the exhibition.
A right time is a must for the exhibition.
应用解析：
fix on 决定，专注，凝视；
fix the blame on sb. 归罪；
fix one's eyes on 注意，凝视；
fix attention on 集中注意力于；
quick fix 权宜之计；
no fixed address 无固定住所

15. Everything should be prepared well for the exhibition.
展会中的一切都要准备好。
还能这样说：
We should make good preparation for the exhibition.
We need arrange everything well for the exhibition.
应用解析：
as well 同样；
do well out of 因……获利；
just as well 不要紧；
may well 还是……好的；
pretty well 几乎，差不多；
well up in 对……在行；对……消息灵通

16. It is necessary to make some leaflets for our stand.
有必要为我们的摊位做些宣传页。
还能这样说：
There is need for our booth to have some leaflets.
We must prepare leaflets for our booth.
应用解析：
know how one stands with sb. 知道别人对某人的看法如何；
stand a chance 有机会；
stand on one's own feet 自助，自立；
stand sth. on its head 彻底改变，彻底推翻

17. It's important to design the exhibition stand well.
把展览摊位设计好是非常重要的。
还能这样说：
Designing the exhibition stand well is very important.
We attribute great importance to the design of stand.
应用解析：
full of one's own importance 自负，自高自大；
an important family 名门；
with an important look 显出神气活现的样子