单项选择题

SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. The man did the following through the Internet that day EXCEPT _______.

A．received and sent some e-mails
B．booked an airline flight
C．did some shopping
D．watched a video program
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[听力原文]A dog is the most useful and faithful animal in the world, but the reasons why people keep a dog have changed. In the old days people used to train dogs to protect themselves against attacks by other beasts. Later they came to realize that a dog was not only useful for protection but also willing to obey his master. When people used clogs for hunting, the dogs would not eat what was caught without permission. Now people in the city need not protect themselves against attacks of animals. Some people keep dogs to protect themselves from robbery or for companionship. For a child, a dog is his best friend when he has no friends to play with. For young couples, a dog is their child when they have no children. For old couples, a dog is also their Child when their real children have grown up. The reason why people keep dogs has changed from protection to friendship.
单项选择题
The problems lies ______ the social injustices in this country.
A．in
B．to
C．with
D．down
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