Help Chia động từ trong ngoặc ở thì quá khứ đơn hoặc thì quá khứ tiếp diễn

1. bought (MĐ1 chia thì QKĐ ⇔ MĐ2)

2. didn't come (MĐ1 chia thì QKĐ ⇔ MĐ2)

3. was (MĐ1 chia thì QKĐ ⇔ MĐ2)

4. was listening (at half-past seven yesterday night ⇒ Thì QKTD)

5. knew (MDD2 chia thì QKĐ ⇔ MĐ1)

6. took (MĐ2 chia thì QKĐ ⇔ MĐ1)

7. were sleeping.......... was doing (at midnight ⇒ Thì QKTD)

8. was standing ........... ran (QKTD + When + QKĐ)

9. took (MĐ1 chia thì QKĐ ⇔ MĐ2)

10. went ( Thì QKĐ)

11. were being ........ went (QKTD + When + QKĐ)

12. decided (four years ago ⇒ Thì QKĐ)