阅读理解。根据短文内容判断下列句子的正误，正确的用A，错误的用B。
Chopin was born in March, 1810 near Warsaw in Poland. He was one of the greatest musicians in the world. In 1831, he was not famous though he could play the piano very well.One day, he went to Paris
to visit the most famous Hungarian pianist Liszt. Liszt liked him very much.
One night, at a concert, Liszt went to the piano and all the people shouted. As all the lights in the hall
went off, a wonderful piano concert started. The music was so good that all the listeners almost forgot
everything except the music. The audience thought that Liszt reached a new level in playing the piano.
Suddenly, all the lights were turned on when the music came to an end. And there stood a young man
near the piano instead of the famous pianist Liszt.
Liszt planned this. As the lights went off, Liszt left his chair and let Chopin take his place and play the
piano. So with the help of Liszt, Chopin soon became famous.
( )1. Chopin was very famous when he was in his own country.
( )2. The piano concert started after all the lights went off.
( )3. When the music came to an end, Chopin stood at the piano.
( )4.The audience knew someone else was playing the piano instead of Liszt before the lights were
turned on.
( )5. Chopin became famous because of his own talent and the help of Liszt.