1. Doctors might use nanorobots by 2015.
2. The police might control criminals with drugs.
3. The Internet may replace books.
4. If it rains, they may cancel the match.
5. He may help you, if you ask him.
6. We might not go out, but it's possible.

Ex. 21 page 45

1. I think people might stop using their cars because petrol will be too expensive.
2. I think records shops will disappear and everyone will buy their music on the Internet because it will be more convenient and economical.
3. I think most people will work from home and will use machines operated by computers.
4. I don't think people will watch TV on their mobile phones because the displays will still be too small for watching videos clearly.

Ex. 10 page 49
When I got home, I knew something was wrong. I walked into the house but I couldn't see anything wrong. I went into the kitchen but nobody was here. Then I heard something - a noise upstairs. Somebody was in the house.

Ex. 11 page 49
Hi, Helen!
We had a really exciting time at the party last night - in fact at 3 a.m. we were still dancing! If you don't come to the next one you will be sorry! No headache excuses next time, OK?! Anyway, when I arrived, Paul was dancing with Abby! I was so surprised! Why was he dancing with her? Where was Ruth? Just then Ruth was walking with Luke! They were holding hands and I felt a bit disappointed because I really liked Luke. But then I met Luke's brother, Harry, and... WOW! But I will tell you about him tomorrow if I see you. Do you think you will feel better tomorrow? Listen, I must go now because Harry is going to phone in a minute - do you think he will ask me out tonight? Who knows - anything might happen!
Get well soon!
Love,
Emma

Ex. 12 page 49
A: Listen! There is somebody out there... He is trying to enter!
B: Oh no! What will we do if somebody breaks the window?
A: I don't know, but I'm going to scream!
B: Wait... look! There's nobody out there - it's only Flip!
A: What? The cat was trying to come into the house?
B: Yes, it was. It's embarrassing... Luckily, nobody heard us!