tìm và sửa lỗi sai
 
----- Nội dung dịch tự động từ ảnh -----
16. Coming into his room, he found that someone broke into it.
17. It always rains when they had just cleaned the windows.
18. The last time I saw him, he wore a black suit.
19. By the first of next July I had worked for this company for 20 years.
20. This is the talking between two friends who had just met up each other.