1. - Yes. In April you could be unlucky with the weather and the sea will cold.
2. - yes. You can learn to surf on the sea, if there is a good wind and wave.
3. - Yes. The Tsar Bell is the biggest bell in the world. Its weight 202 tons, height of 6.14 meters, a diameter of 6.6 meters.
4. - No. The Hermitage is the biggest museum in the city, not in the world.
5. - No. Hermitage is not the oldest museum in St. Petersburg. One of the oldest museum of Russia is Kunstkammer.
6. - Yes. Holidays abroad are always more expensive, because there are additional costs for visa, air tickets and accommodation. But unfortunately, as we can see in the Olga`s story, this holiday is not always better.