1. Boiling an egg is not difficult
-> It
2. The ancient Egyptians built the pyramids
-> The pyramids
3. Cairo is hotter than Lon don
-> Lon don isn't
4. It's two years since I was just in Ha noi
-> I have not
5. She is overweight because she eats too much meat
-> If she
6. '' I have visited this beauty spot many times '' said my father
-> My father told me
7. People say that he is a famous singer
-> It
8. The police man does not run so fast as the thief
-> The thief
9. I haven't seen this man here before
-> This
10. The novel is very interesting
-> We
11. Please don't smoke in the dining room
-> I'd rather
12. The flight to Moscow lasted three and a half hour
-> It took
13. Mrs. Smith is the wisest member of the family
-> No member
14. I remembered and so did she
-> He didn't
15. I wasn't there at that time
-> He denied
1. Boiling an egg is not difficult
-> It is not difficult to boil an egg.
2. The ancient Egyptians built the pyramids
-> The pyramids were built by the ancient Egyptians.
3. Cairo is hotter than Lon don
-> Lon don isn't as hot as Cairo.
4. It's two years since I was just in Ha noi
-> I have not been in Ha Noi for two years.
5. She is overweight because she eats too much meat
-> If she didn't eat too much meat, she wouldn't be overweight.
6. '' I have visited this beauty spot many times '' said my father
-> My father told me he had visited that beauty spot many times.
7. People say that he is a famous singer
-> It is said that he is a famous singer.
8. The police man does not run so fast as the thief
-> The thief runs faster than the policeman.
9. I haven't seen this man here before
-> This is the first time I have seen this man here.
10. The novel is very interesting
-> We are very interested in the novel.
11. Please don't smoke in the dining room
-> I'd rather you didn't smoke in the dining room.
12. The flight to Moscow lasted three and a half hour
-> It took three and a half hour to fly to Moscow.
13. Mrs. Smith is the wisest member of the family
-> No member of the family is wiser than Mrs. Smith.
14. I remembered and so did he
-> He didn't forget and neither did I.
15. I wasn't there at that time
-> He denied being there at that time.
