In this section, you will hear 3 short passages. At the end of each
passage, you will hear some questions. Both the passage and the questions will
be spoken only once. After you hear a question, you must choose the best answer
from the four choices marked A, B, C and D.
Passage One Questions 26 to 28 are based on the passage you have just heard.
A．It preserves the vitamins. B．It breaks down the vitamins. C．It makes the meat easier to digest. D．It reduces the protein content.