Present Perfect / Present Perfect Continuous. Rewrite the sentences beginning .with the given words so that it means

I. 1. We started building that house 4 years ago. We have been building it for 4 years. 2. Is this your first visit to the Hermitage? Have you ever been to the Hermitage before? 3. It\'s a long time since we spoke to your friend. We haven\'t spoken to your friend for a long time. 4. I came to meet my friend at 7 pm. I\'m still waiting. I have been waiting for my friend since 7 pm. II. 1. A house is more comfortable and smaller than a castle. 2. An industrial city is dirtier and more polluted than a small village. 3. BMW is bigger and safer than Tavria. 4. A tourist centre is noisier and more crowded than a small town. III. Good - better - the best. Bad - worse - the worst. Little - less - the least. Far - farther - the farthest (further - the furthest)