1.You sound like something's bothering you, Susan.

表示對某人的關心。

2.That's not it.

對別人的說法表示否定。

3.I need your advice on a personal matter, but it's not about me.

向別人請求建議，而且是以比較直接的方式表達出來。

4.It won't sound like a big deal, but it is.

a big deal是指一件大事。sound like聽上去像。

5.Shall I call Mr. Marchetta for you?

咨詢某人意見。

6.I have an idea that may solve the problem for him and help a lot of other people.

that may solve the problem……是定語從句，修飾idea。一般情況下idea后面可以跟that引導的同位語從句。區分這兩者的辦法是，idea后面的從句是idea的具體內容時，是同位語從句，對其做補充說明，更加完整。后面的從句起修飾作用時，是賓語從句。