Sure, I'd be happy to help you correct these sentences. Here are the corrections: 1. Christopher will go to the market tomorrow afternoon. 2. The director arrived an hour ago. 3. It's raining heavily now, and Peter left his umbrella at home this morning. 4. It's been a long time since your friends last visited us. 7. She always drives her car carefully so that she never has an accident. 8. They play badminton every afternoon. 9. Quang bought a fishing rod yesterday because he likes going fishing. 10. It is very cold here. Would you mind closing the door for me? 11. We are having a birthday party on Sunday night. Would you like to come? 12. Alex didn't have to take his medicine yesterday because he was better. Please note that there may be additional corrections needed, as some sentences may have more than one error.