Choose the underlined part among A, B, C or D that needs correcting. Giải giúp bt với ạ.

7. If you sold your house, you didn't get much money forit. A B C D 8. What would you do if you have chance to travel in the submarine? A B с D 9. If Mr. Black weren't late, he wouldn't have lost his job. A B C D 10. What could happen if the police hadn't arrived so quickly?