Tìm lỗi sai: 1. When I walk past the park, I saw some children play football. 2. After John eaten dinner, he wrote several letters and went to bed

----- Nội dung dịch tự động từ ảnh -----
1. When I walk (A) past the park, I saw some children play football.
2. After John eaten (A) dinner, he wrote several letters and went to bed.
3. What did you do (A) at 9 o'clock last night (B)? I phoned (C) you but nobody (D)
answered.
4. When (A) I arrived (B) at (C) the station, the train has already left (D).
5. Ann and Susan have known (A) each other (B) during (C) they were (D) at school.
6. She has disappeared (A) three days ago, and (B) they are still (C) looking for her (D)
now.
7. After Mrs. Wang had returned (A) to her house (B) from work (C), she was cooking (D)
dinner
8. It's (A) the first time (B) I saw (C) this film (D)
9. After (A) he graduates (B) from (C) university, he joined the army (D).
10. Up to now (A), there had been (B) no (C) woman being chosen (D) the US president.