Giúp ạ sử dụng mệnh đề tính từ

17. He is writing the book. The book is written in English. 18. The house is very expensive. It was designed by a French man. i viết lại 20. It's difficult to see Mr. Binh. He is our general director. 21. The course Jasted two months. A lot of students attended it. ugh, de noweve 22. T ...