7. I couldn't do the test because it was too difficult.
→ **If** the test hadn't been too difficult, I could have done it.

11. I didn't know that Lan had to get up early, so I didn't wake her up.
→ **If** I had known that Lan had to get up early, I would have woken her up.

12. I was able to buy the car because Hoa lent me the money.
→ **If** Hoa hadn't lent me the money, I wouldn't have been able to buy the car.

13. Marry was not injured in the crash because she was wearing the seat belt.
→ **If** Marry hadn't been wearing the seat belt, she would have been injured in the crash.

14. I didn't get a taxi because I didn't have any money on me.
→ **If** I had had money on me, I would have gotten a taxi.

15. A bull was blocking the road, so we didn't arrive on time.
→ **If** a bull hadn't been blocking the road, we would have arrived on time.

16. I was working at the restaurant last night, so I didn't wait on your table.
→ **If** I hadn't been working at the restaurant last night, I would have waited on your table.

17. Carol didn't answer the phone because he was studying.
→ **If** Carol hadn't been studying, he would have answered the phone.

18. The sun was shining, so we went to the beach yesterday.
→ **If** the sun hadn't been shining, we wouldn't have gone to the beach yesterday.

đây bn nhé

7. I couldn't do the test because it was too difficult.→ **If** the test hadn't been too difficult, I could have done it.

11. I didn't know that Lan had to get up early, so I didn't wake her up.
→ **If** I had known that Lan had to get up early, I would have woken her up.

12. I was able to buy the car because Hoa lent me the money.
→ **If** Hoa hadn't lent me the money, I wouldn't have been able to buy the car.

13. Marry was not injured in the crash because she was wearing the seat belt.
→ **If** Marry hadn't been wearing the seat belt, she would have been injured in the crash.

14. I didn't get a taxi because I didn't have any money on me.
→ **If** I had had money on me, I would have gotten a taxi.

15. A bull was blocking the road, so we didn't arrive on time.
→ **If** a bull hadn't been blocking the road, we would have arrived on time.

16. I was working at the restaurant last night, so I didn't wait on your table.
→ **If** I hadn't been working at the restaurant last night, I would have waited on your table.

17. Carol didn't answer the phone because he was studying.
→ **If** Carol hadn't been studying, he would have answered the phone.

18. The sun was shining, so we went to the beach yesterday.
→ **If** the sun hadn't been shining, we wouldn't have gone to the beach yesterday.