以下哪个句子是被动语态的例子？ A. The cat chased the mouse. B. The mouse was chased by the cat. C. The cat is chasing the mouse. D. The cat will chase the mouse. 答案解析 本题考察被动语态的识别。被动语态的句子通常包含一个被动形式的动词，强调动作的承受者。正确答案是B，'The mouse was chased by the cat.' 是被动语态。选项A、C和D均为主动语态，强调执行者而非承受者。 正确答案：B