The first wild animals taoled（馴服）by humans were dogs．This （A）________in Europe about 10,000 years ago.

    The first “dogs” were like the ones we have now．Maybe they were small wolves（狼）or a type of dog like the Australian dingo（澳洲野狗）．

    These dogs probably came near humans to get some food．Some of their puppies（幼犬）were caught by people and grew up with （B）them．These puppies were quite tame as they grew up.（C）They thought humans were part of their group!

    Humans realized the dogs were very （D）helpful to them in（E） a number of ways．The dogs helped people hunt（打獵）．They could smell and hear danger before people could．They helped keep people（F）________on cold rights．It was fun to have them!

    Over a long time, people were able to keep the dogs for different purposes．Some were for hunting；some for herding（放牧）; and some just for pets．These dogs looked quite different from each other．For example，a German Shepherd looks a lot different from a Yorkshire terrier!

  （G）It is said that世界上有400多種犬．Today．dogs depend on human more than any other animals．

1．在文中（A）和（F）的空白處分別填入一個(gè)適當(dāng)?shù)脑~語： ________；________

2．在文中（B）和（C）處分別指代：________；________

3．寫出劃線部分（D）和（E）的同義詞或近義詞：________；________

4．將文中（G）處劃線部分句子譯成英語：________________________

5．從文中找出能說明本文中心大意的句子：________________________