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2. —Why are trees so important to our environment?

—Because they can hold water and keep soil in , especially in desert areas.

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                    (B)

 In Britain,people often invite friends for a meal,a party or just coffee. People who know each other very well—close friends,family or neighbours —may visit each other's house without an invitation,but usually an invitation is needed. When people invite someone to their homes,they often say ,“Would you like to come for dinner on Saturday?”Answers are ,“Thanks,we’dlove to. What time?” or “I'm sorry. We’d love to,but we have tickets for the concert."However,it is not polite to say “No,we wouldn’t!” Sometimes,the British use expressions that sound like invitations but which are not invitations. For example/4You must come over for a drink sometime." Or “Let's go out for a meal one of these days." These are usually polite ways of ending a talk. They are not real invitations because they don't mention an exact time or day. They just show that the person is trying to be friendly and the answers are “Yes,that would be nice." Or “() K. Yes,thanks."

() 6. It's usually necessary for   to visit each other's houses with an invitation.

   A. close friends   B. family members

   C. neighbours   D. All the above

() 7. It is not polite to answer the real invitation by saying   ”.

   A. Sorry,we love to but we have tickets for the concert.

   B. No,we wouldn’t.

   C. Thanks,we'd love to. What time?

   D. Sure. We’d like to. Thanks a lot.

() 8. If the British just want to end a talk politely,they may say  ”

   A. Would you like to come for dinner on Saturday?

   B. Let's go out for a meal one of these days.

   C. Let's go out for a meal on Saturday.

   D. Shall we go for a drink this afternoon?

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   A. Yes. What time? B. No. That's not a real invitation.

   C. OK,yes,thanks. D. No. You just want to be friendly.

() 10. Which is the best title for the passage?

   A. Britain   B. Invitation

   C. A Talk with Friends   D. A Letter to Friends

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