số nào là số vô tỉ:
a, căn bậc 2 của 15-6

b, căn của 11
c, âm căn bậc của 15

d. 0.(12)

PART C: READING (2 marks)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from ($) to (#).

Wolfgang Amadeus Mozart was one of the [21]   ________    musicians in the world. He created some of the most beautiful music ever heard, which made him become people's favorite composer of all time. Mozart was [22]   ________     in 1756 in Austria. Mozart's father, Leopold, was a musician. He played the violin and he worked as a music teacher. His son Mozart [23]   ________   plays the piano when he was 3. At the age of 4 he started to write music. He simply took a violin and started to play before anyone showed him how to play the instrument. Mozart's sister, Maria Anna, was good at music, too. Mozart and his sister invented their own secret language. They told stories about a magic kingdom where they were a king and a queen. Leopold took his two children to Vienna. There they played for the Emperor of Austria at his palace. Everyone [24] ______ their talent and the Emperor called Mozart a “little magician”.