【问】 No one imagined that the apparently_______ business man was really a criminal.

A. respectful B. respective C. respectable D. reverent(Nelson，450B)

我拿不准是选A，还是选C。

【答】 respectable和respectful是两个易混的词。但是如能抓住形容词后缀-able和-ful的特点，还是很容易掌握它们之间的区别的。-able可加在动词之后构成形容词，一般具有被动意义。observable(可被观察到的)，breakable(易破碎的)，loveable(可爱的)，forgivable(可原谅的)，respectable(受尊敬的，可敬的)。由后缀-ful构成的形容词一般具有主动意义，helpful(有益的)，useful(有用的)。respectful=showing respect，一般是指某人对他人的尊敬。请看下面的实例：

1. He looked like a respectable American businessman... (EED)

他看上去象是一个可敬的美国商人……

2. I wish you would be more respectful to your father. (Shaw)

我希望你更加尊敬你的父亲。

3. She kept a respectful silence. (EED)

她保持恭敬的沉默。

请做下面的英语试题：

1. During the course of the game，the young captain has the task to keep a respectabledistance behind his chief and devotes his energies to the task of not winning and at thesame time not losing too easily.

2. It is not considered____to litter in public.

A. respectful B. respective C. respected D. respectable

(参见adjective³)