Although a goldfish is easy to___,I think it's difficult to

Although a goldfish is easy to___,I think it's difficult to i think a goldfish is very easy ___?to take care\ to look af A:I think it is quite interesting to keep some goldfish.plea To be a man is not easy,it's very difficult!living naturally 填写词的适当形式English is my favourite .I think it's easy to learn I think Maths is not easy ,but it's I think that it's a bit difficult for me to learn English we I think it's easy to stay h---. I think geography is difficult to learn it. In English a difficult subject ? no, I think it's I think it is easy to study Chinese. i think it is easy to learn a foreign language.（改为同义句.）