请说明原因,My pen pal Andrew found it difficult _____Chinese well

请说明原因,My pen pal Andrew found it difficult _____Chinese well I found it difficult to get on well with my new classmates改为 my pen pal 作文 Who is the____form?It is form my pen pal . It is from my pen pal at Brazil I found it very difficult to learn maths well. My pen pal 英语作文 英语作文my pen pal My pen pal初一作文 my pen pal英语作文 英语作文 my pen pal 形式宾语it的用法they found it difficult to study well 与 they found