1. If Mary didn't come late, she could see the main part of the play/ If Mary came early,.... (If type 2)
2. Have you seen the book which I put on your table? (Có thể thay which bằng that)
3. Raw sewage has been pumped directly into the river for many years (Bị động hiện tại hoàn thành)
4. That dress hasn't been worn since her sister's wedding
5. The car in which she escaped is blue (Mệnh đề quan hệ: In which)
6. Wash (Cấu trúc Have + O(người) + V)
7. Succeeded (Succeeded + in + V_ing)
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