1. When will you sign the contract if I agree to become a member of your organization?

如果被录用的话，什么时候可以和贵单位签约?

还能这样说：

When can the contract be signed if I agree to work in your company?

When can I make the contract with your company if I am willing to be in your company?

应用解析：

be subject to contract 以合同的签定为依据;

literal contract 成文契约;

make a contract with 与……签订合同

2. May I see the agreement first?

能让我看下这份协议吗?

还能这样说：

Could I look at the contract first?

Can I have a look at the contract first?

应用解析：

look用于看静止的东西;

watch用于看动态的东西;

gaze以惊讶、赞赏的心情凝视;

stare以惊讶、赞赏、恐惧的心情，睁眼瞪视;

glance扫视，看一眼。

3. We will sign the contract three months later.

三个月后才签合同。

还能这样说：

The contract will be made after you have worked here for three months.

We can enter into the agreement three months later.

应用解析：

sign指具有一定含义的任何有形或无形的符号或标志，它的表示可以是实物、表情、动作、文字、语言及任何痕迹或征兆;

mark指为某一目的有意做的标记，也指无意留下或自然形成的痕迹。

4. Could you explain me about this item?

你可以给我解释一下这个条款吗?

还能这样说：

Can you give me an explanation of the item?

What does this item mean?

应用解析：

explain指解释不明之事;

interpret侧重于用特殊的知识、信念、判断、了解或想象去阐明特别难懂的事物。