sceptical，怀疑的

例句

She looked highly sceptical.

她一脸深表怀疑的神色。

suspicious，adj.

感觉可疑的怀疑的令人怀疑的可疑的不信任的持怀疑态度的

例句

Police said there were no suspicious circumstances surrounding the boy's death.

警方说关于男孩死亡一事没有发现可疑的情况。