1. I smell a rat. 我觉得不对劲。

2. There was something wrong with all of them. 他们所有人都不太对头。

3. It's odd that nobody told me about this before. 真奇怪，之前没人跟过说过这事。

4. That's queer indeed! 实在太诡异了！

5. There's something fishy going on here. 这里面有些事不太对劲。

6. That's strange. He was here a minute ago. 真奇怪!他刚才还在这儿呢！

7. I heard a weird noise. 我听见有奇怪的声音。

8. I feel puzzled. 我茫然了。