The book is difficult to understand 的to做什么成分

I have finished a large part of the book,the rest of which___ more difficul最好给我一些解释啊 汉语翻译 Everyone in the world,whether he or she is rich or poor,will encounter a lot of difficul WHERE IS THE BOOK? the book is (you) The book is her book近义词 what price is the book The book is boring翻译 The second______( book ) is yours. where is the interesting book? Here is the book 翻译 The interesting book is who the book is a hit the book is worth______________(百看不厌) _____ ____ the book? The book is on the table. 英语翻译Qingshi piled with rammed earth and the world's architectural wonders,after years still stand tall wind of cultural heritage,is facing the threat of desertification and man-made destruction - tourist area on the wall lettering is difficul the english book is on the shelfthe book on the shelf is an english book 英译汉 The English book is thinner than the Chinese book. he is opening the book对opening the book提问