1. I have to read this book today.2. Probably, he forgot his umbrella at work.3. I didn’t see John in office. Maybe, he he ill.4.Where is your son? — He’s probably playing in the yard.5. I couldn’t help you, because I had to meet my mother-in-law.6. You can’t watch programs like this.7. Probably, our neighbors moved into another flat. We haven’t seen them in a while. 8. You have to introduce me to this man.9. I don’t know... Sorry.10. You must be very careful when you crossing the road in London.