听一段材料，回答下面几个小题。According to the passage,what were dogs trained for in the past?
A.For protection against other animals.
B.For protection against other dogs.
C.Just for fun.Why were dogs used for hunting?
A.Because they did not eat other animals.
B.Because they were useful for protection.
C.Because they always obeyed their masters.What is the most important reason for people in the city to keep dogs now?
A.For companionship.
B.For amusement.
C.For protection against robbery.
听一段材料，回答下面几个小题。Where does this conversation take place?
A.On a train.
B.Near a bus stop.
C.In a department store.What did the man do?
A.He hurt the woman.
B.He helped the woman carry the bags.
C.He made the woman drop the bags to the ground.What is the woman like?
A.She is kind.
B.She is rude.
C.She is proud.
听一段材料，回答下面几个小题。What are the two speakers mainly talking about?
A.When they surf the Web.
B.What they do on the Internet.
C.How they look up information online.How often does the man probably surf the Internet?
A.Once a week.
B.Twice a week.
C.Several times a week.What do we know about the man?
A.He has never sent e-mail.
B.He gets some help from the Web.
C.He shows no interest in the Internet.
What do we know about the man?
A.He saw off his father at the airport yesterday.
B.He was late for class yesterday morning.
C.He went to meet his cousin yesterday morning.
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