Course book: Unit17

16: 1. Such
       2. so
       3. so
       4. such a
19: 1. Enough
       2. enough
       3. too
       4. too
       5.too
       6. enough
       7. too
20: 1.The bridge was too low for the lorry to pass under.
           The bridge wasn’t high enough the lorry to pass under.
           The bridge so high that the lorry couldn’t pass under.
            It was such a low bridge that the lorry couldn’t pass under.
        2.This ocean is not warm enough for tropical fish to survive in.
            This ocean is too cold for tropical fish to survive in.
            This ocean is so cold that the tropical fish to survive in.
             It is such a cold ocean that the tropical fish to survive in.
        3. The rabbit was so fast that the dog couldn’t catch it.
             The rabbit was too fast for the dog couldn’t catch.
             The rabbit wasn’t slow enough for the dog couldn’t catch it.
              It was such a fast rabbit that the dog couldn’t catch it.
        4. The sign was so small that Mary couldn’t see it.
             The sign was too small for Mary couldn’t see it.
             The sign wasn’t big enough for Mary couldn’t see it.
             It was such a small sign that Mary couldn’t see it.