选C.respectful
be respectful to sb 对某人尊敬
respectful adj. (主语)尊敬(别人)
例: Rose is respectful toward the elders.
释: Rose对老者很尊敬。表示Rose的对待老者的态度。
如:She received guests with a respectful attitude.
respectable adj. 用来表示主语的属性,(主语是)受人尊敬的,有声望的
例: Joe was respectable and no one questioned.
释: Joe品格高尚, 没有人怀疑。表示别人对Joe的看法。
如:I must go and put on a clean shirt and make myself look respectable.
c
respectable=值得尊敬
respectful=懂得尊敬