----- Nội dung dịch tự động từ ảnh -----
S+had+been+v3/ed+by O
Example: They had printed the book before 1950. → The book had been printed by them
before 1950..
1. She had mended the bicycle. → The bicycle..
2. They had exported the rice before May. + The rice..
3. I had waited her before I came here. + She..
4. No one had met me before I left. + I