23. A man who doesn't like to talk about himself or to make his feelings known to others is called a ________ man.  
    A. reserved   B. conservative   C. tolerant   D. preserved

<reserved>
reserved  内向的，矜持的，寡言的
introverted  内向的
extroverted  外向的
</reserved>

<conservative>
conservative  保守的
</conservative>

<tolerant>
tolerant  忍受的，容忍的
</tolerant>

<preserve>
preserve  保存以备后用，保藏
conserve  保护，保存
</preserve>