I need last year's project manual.
我需要去年的项目手册。
I need last year's project manual. Could you send it to me?
我需要去年的项目手册。您能寄给我吗？
I'd like to look at last year's project manual. I would appreciate it if you could send it to me.
我想看看去年的项目手册。如果您能寄给我，我将不胜感激。

If needed, we will be asking for some additional information.
如果有必要，我们将申请一些额外信息。
We will review the document and if needed, we will ask for additional information. We will get back to you by Friday with the result of the review. We might ask you to come in for a meeting later.
我们将审核此文件，如果有必要，我们将申请一些额外信息。我们将在周五之前告诉您审核结果。之后我们也许会邀请您来参加会议。