单项选择题

Directions: 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.

A. Its protection is often neglected by children.
C. There are many false notions about it.
B. It cannot be fully restored once damaged.
D. There are various ways to protect it.