现有以下四个结论：①绝对值等于其本身的有理数只有零；②相反数等于其本身的有理数只有零；③倒数等于其本身的有理数只有1；④平方等于其本身的有理数只有1．

其中正确的有（ ）

A．0个

B．1个

C．2个

D．3个

The story is _________ and all of us are _______ in it.

A．interest; interesting

B．interesting; interest

C．interested; interesting

D．interesting; interested