4. Last year, my son could play soccer, but my daughter played the piano.
5. Lars did not go to school last week because she had a bad cold.
6. She did not lock the front door last night, so the thief stole her bike.
7. My family does not have the Internet because we like to talk to each other.
8. Nad had better not smoke because it is bad for his health.
9. We decided to go for a short walk before sitting down for lunch.
10. You have to study hard if you want to pass all your exams.
11. Thank you for inviting me to speak to your students about pollution.
12. We will be able to take part in the new judo club in our area next week.
13. When my friend came to see me, I was busy working in the garden.
14. Mr. Cuong needs to be home before 7 because he wants to see "Good Luck".
15. If you want to write to a friend in another country, what would you say in the letter?
16. I hope your students enjoy studying English, and I look forward to meeting them.
17. These exercises are too difficult for my students to do without making mistakes.
18. Studying English without practicing speaking is not a good idea.
19. How about coming to my home and having something to eat before we go?