5.[单选题]Which of the following best describes the meaning of the word 'immerse' in the sentence: "The doctor at the clinic couldn't do much by then, but immersed me in a tub of cold water to help lower my body temperature."?A. To put something into water.B. To read a book carefully.C. To write a story.D. To sleep peacefully.

本题考查对单词“immerse”含义的理解，解题思路是结合句子语境来推断该单词的意思。
在句子 “The doctor at the clinic couldn't do much by then, but immersed me in a tub of cold water to help lower my body temperature.” 中，描述的是医生把“我”放进冷水浴缸里来帮助降低体温。

• 选项A “To put something into water” 意思是把某物放进水里，这与句子中医生把“我”放进冷水浴缸的行为相符合。
• 选项B “To read a book carefully” 是认真读书，与句子中医生的行为和语境无关。
• 选项C “To write a story” 是写一个故事，也不符合句子所表达的意思。
• 选项D “To sleep peacefully” 是平静地睡觉，同样与句子内容不匹配。