show great interests in sb.还是show great interest in sb.

名词 n.
1.兴趣;关注;爱好[C][U][(+in)]
I developed an interest in the machine.
我对这机器发生了兴趣.
I have lost my interest in chemistry.
我对化学已不感兴趣.
2.趣味性[U][(+to)]
Local color added interest to the novel.
地方色彩增加了这部小说的吸引力.
3.感兴趣的事物或人[C]
His two great interests in life are music and painting.
他生活中的两大兴趣是音乐和绘画.
4.利益;利害;同业;同行[P1]
We work for our common interests.
我们为共同的利益而工作.
5.利息[U]
I borrowed the money at 5% interest.
我以五分利息借了那笔钱.
6.股份,股权[C][(+in)]
He has an interest in the company.
他在这家公司拥有股份.
7.重要性;影响[U][(+with)]
Her interest with him is considerable.
她对他的影响相当大.

show great interest in sb
因为不可数啊