A: Did you like the zoo?
B: Yes, I was so excited to see the{#blank#}1{#/blank#} ! They were so cute.
A: It was {#blank#}2{#/blank#} _to learn about the Wolong Panda Reserve.
B: But it's sad to think about all those animals in{#blank#}3{#/blank#} . It makes me mad!
A: The surprising thing is to hear how many animals are in danger.
B: I think we need to{#blank#}4{#/blank#}them better.
A: Let's find out what we can do to save {#blank#}5{#/blank#} .

    We are all busy talking about and using the Internet, but how many of us know the history of the Internet？

    Many people are{#blank#}1{#/blank#}when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer networks didn't work well. If one computer in the network{#blank#}2{#/blank#}, then the whole network stopped. So a new network{#blank#}3{#/blank#}had to be set up. It should be good enough to be used by many different computers. If{#blank#}4{#/blank#}the network was not working, information could be sent through another part, In this way the computer network system would keep on working all the time.