1
1- the greatest
2 tiny
3 - cleaner, muddier
4 better
5 worse
6 higher
2
1 A lot of time was wasted when we were looking for the right house.
2. A lot can be done to stop the destruction of forests.
3. Nuclear weapons mustn’t be used.
4. A lot can be told about extinct animals of our planet.
5. The text ought to be rewritten so that it will look nicer.
6. These fragile cups should be packed very well or they may be broken.