1. I don't have so many friends. -> I have......not many friends..............
2. My brother drinks more coffee than my sister.
-> My sister drinks.......less coffee than my brother.......................................
3. It is necessary to learn English well. -> Learning....English well is necessary....
4. We should get up early every day. -> We shouldn't.....get up late evryday..........
5. How wide is this room? -> What......is the width of this room?.........................
6. Don't forget to lock the door before you leave.
-> Be sure.... to lock the door before you leave...........