9. We must learn to communicate and cooperate with each other.
我们必须学会与他人交流和合作。
还能这样说：
We must exchange our ideas with others and work together with them.
We must have the idea to communicate and cooperate with each other.
应用解析：
cooperate in harmony 协调地合作；
cooperate towards that end 协力达到那个目标

10. At the end of every month, members in the company should summarize what they do in the 30 days.
每到月末，公司员工需要总结30天里所做的工作。
还能这样说：
All the staff in the corporation needs to make a summarization at the end of every month.
At the end of every month, the staffs in the enterprise need to summarize their work contents.
应用解析：
summarize for 为……概括；
summarize in a sentence 归纳成一句话；
summarize the lecture 总结报告

11. Besides strong academic background, I am very industrious.
除了良好的学术背景，我还十分勤奋。
还能这样说：
I am not only well-educated but also diligent.
I have strong academic background and I am diligent, too.
应用解析：
be strong on 擅长某事物，善于做某事；
a strong stomach 不感到恶心；
going strong 依然健壮；
as strong as a horse 力大如牛的

12. I acquired rich experience in market operations.
我拥有丰富的市场运作经验。
还能这样说：
I was experienced at market operations.
I was familiar with market operation.
应用解析：
bring sth. into operation 使某事物生效，起作用；
put into operation 使出于某种状态；
be in operation 实施中；
operation on sb. 对某人进行手术