1. Can you hear that noise? It must BE RAINING.
2. Look at this mess! She must HAVE BEEN PAINTING the walls.
3. Jess left work half an hour ago. She might COME later than expected.
4. Are you joking! Bob can't HAVE GONE to Paris last week. I thought e had to sort out the problems at work first.
5. My mum cleaned my room yesterday. She must HAVE SWEPT my project.
6. The children must HAVE EATEN all the biscuits! There are none left.
7. I don't know what Kate is doing. She may BE HAVING dinner.
8. Jane isn't here yet, but she might COME any moment.
9. Nick can't BE PLAYING football. I've just seen him in the room.
If scientific progress had not progressed now, we could not live as it is now. Scientific progress has greatly affected people's lives. If not for scientific progress, people would not be able to live as long as they are now. Thanks to scientific progress, we are less likely to get sick, and live longer than our long-standing ancestors. People have no doubt become smarter and more educated! Now, thanks to scientific progress, we are exploring other planets, oceans, seas and much more! Without a doubt, I can say that this progress is very important for us! Now people are progressing further, creating a cure for new diseases and the like. People have already overcome and discovered many different diseases, and saved thousands of lives. This progress is without a doubt very important to us.
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