星级典句：

第一句：Do you think I would believe a story like that?
你认为我会相信那样的谎话吗？

A: John, you are late again.
约翰，你又迟到了。
B: My mother was ill, and I ...
我母亲病了，我……
A: Do you think I would believe a story like that?
你认为我会相信那样的谎话吗？
B: Well, the truth is I overslept.
哎，其实是我睡过头了。

第二句：It's hard to tell.
那很难说。

A: He promised to allow us a commission of 10%.
他答应给我们10%的佣金。
B: It's hard to tell.
那很难说。

对对方的话表示怀疑或不确信的相关表达法还有：

I don't have much trust in his words.
我不太相信他的话。

I won't take it too seriously.
我不会对这个太认真的。

It sounds fishy to me.
我觉得有点可疑。