be /get / become accustomed to 习惯于；适应于 (= be/get used to)其中to为介词

My eyes soon became accustomed to the darkness. 我的眼睛很快适应了黑暗。

4. I knew it was time to quit smoking.

quit动词，过去式和过去分词是quit或quitted，现在分词为quitting.

5. I didn't know, for example, that it could do terrible damage to

your heart and lungs or that it was more difficult for smoking

couples to become pregnant.

do damage to 对......有害

翻译：吸烟对你的健康有害。

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【知识拓展】

do harm to 对......造成伤害 do good to 对......有好处

do bad for 对......有害处

6. Decide on a day to quit.

decide on 对......作出决定

We decided on Spain for our holiday this year. 今年我们决定到西班牙度假。

7. Every time you feel like smoking a cigarette, remind yourself that you are a non-smoker.

"feel like"的具体用法如下：

"feel like + n./pron./doing sth." ，意为"想要某物"或"想要做某事"。例如：I feel like a drink. I don't feel like eating.

8. But I did finally manage.

在"did/do/does+动词原形"中，"did/do/does"为助动词，意为"确实，的确，真的"，用于肯定句和祈使句中，起到强调谓语动词的作用。

9. It is not easy to stop smoking, but millions have managed to quit and so can you.