21. I'd rather not go to the museum.
22. Would you mind if I borrowed your pen?
23. It isn't difficult to boil an egg.
24. The pyramids were built by the ancient Egyptians.
25. London isn't as hot as Cairo.
26. I haven't been to Ha Noi for two years.
27. The thief runs faster than the policeman.
28. This is the first time I have seen this man here.
29. We find the novel interesting.