Definition: doubt or uncertainty Level: B2
毫无疑问，这个错误是他的责任。
There's no ___question that the mistake was his fault.
这项新政策是否会改善教育状况尚有疑问。
Whether the new policy will improve education is open to ___question.
他最近的表现让人怀疑他是否适合升职。
His recent performance calls into ___question his suitability for the promotion.
