阅读下面的短文，在标有序号的空白处填入一个适当的词，或填入括号中动词的适当形式。

It seems   小题1:    that at my age I am still fit enough to cycle  20 kilometers in an afternoon. I think my long and active life must be   小题2:  to the healthy life I live. I know how easy it is to start smoking and how    小题3:  it is to stop. During adolescence, I also became  小题4:  to cigarettes. When l was young, I didn't know that it could do 小题5:  to my heart and lungs.    小题6:    did I know that my cigarette smoke could affect the health of non-smokers. However, what I   小题7:   (do) know was that my girlfriend thought I smelt terrible and that she wouldn't go out with me again unless I stopped. 1 also noticed that I became breathless quickly. Then I knew  小题8: was time to quit smoking. I'm sending you some advice to help you  小题9:your resolve. Every time you feel like 小题10:(smoke), remind yourself that you are a non-smoker. Keep trying, and you will succeed.