[听力原文]
M: Has Peter come back from his trip to China
W: Yes, and he liked it so much that after only two weeks at home, he went back to study Chinese for a year.

What does this conversation tell us about Peter（）

A．She is curious about.the headphone.
B．She is enjoying some nice music.
C．She is trying to catch every word.
D．She is ill at ease about her listening.

A．必须解决有关水的各种问题，这很重要，因为只要还有人活着，水就依然和现在一样重要—其重要程度仅决于空气。
B．各类关于水的问题很重要，必须得到解决，原因是，只要人们活着，水就将继续保持和现在同等重要的地位—其重要性仅次于空气。
C．重要的是水的问题已经得到了解决，为了人能活下去，水将继续发挥它现在的重要性—除了空气，就数它重要。
D．解决水的问题是十分重要的，因为如果人要活下去，就要继续维护水现在的样子—它的重要性在空气的下面。