I'm interested _______this English book.

I'm interested in this English book.

~ (in sb/sth) state of wanting to learn or know (about sb/sth); curiosity; concern 兴趣; 好奇心; 关心: feel, have, show, express (an) interest in sb or sth 对某人或某事物觉得有、 有、 表现有、 表示有兴趣 * a topic that arouses, provokes, stimulates, etc a lot of interest 能引起、 激起、 唤起...很大兴趣的话题 * Now he's grown up he no longer takes any interest in his stamp collection: he's lost all interest in it. 他已经长大了, 对集邮不再感兴趣了, 完全失去了兴趣了. * do sth (just) for interest/out of interest/for interest's sake, ie (just) to satisfy a desire for knowledge （纯粹）因为有兴趣[从兴趣出发/为了兴趣]而做某事（以满足求知欲）.

希望对你有所帮助。
祝你愉快！

be interested __in_____词组,对什么有兴趣所以选A

be interested in 固定搭配

A