She asked me which one I'd like, and I said I didn't mind.
她问我要哪一个,我说哪一个都没有关系。[动词时态一致,这是中国人学习英语最头痛的一个问题。]
They went through the rooms, being careful to touch nothing, as they did not want to hinder the police in their search for fingerprints.
他俩搜遍这每一个房间,小心翼翼地不接触任何东西,因为他们怕妨碍警察寻找指纹。