skeptical|sceptical
他们非常怀疑他的动机。
They’re very ___skeptical of his motives.
他不切实际的承诺让选民深感怀疑。
His unrealistic promises left voters deeply ___sceptical.
他对聘请顾问持怀疑态度。
He was ___skeptical about hiring a consultant.
就个人而言，我非常怀疑这个社会解决无家可归问题的能力。
Personally, I am very ___skeptical about this society's capacity to solve the homeless problem.
董事会从一开始就对提议的合并持怀疑态度。
The board was ___sceptical of the proposed merger from the start.
许多人对替代疗法的有效性持怀疑态度。
Many people are ___sceptical about the effectiveness of alternative medicine.