Let us begin by saying what causes our dreams. Our dreams do not come from another world. They are not messages from some outside source .They are not a look into the future, either.

All our dreams have something to do with our feelings, fears, longings, wishes, needs and memories. If a person is hungry, or tired, or cold , his dreams may include a feeling of this kind. If the covers on your body, such as a quilt or a blanket, have slipped off your bed, you may dream that you are sleeping on ice or in snow. The material for the dream you will have tonight is likely to come from the experience you have today.

So the subject of your dream usually comes from something that has influence on you while you are sleeping（feeling of cold, a noise, a discomfort, etc.）and it may also use your past experiences and the wishes and the interests you have now. This is why children are likely to dream of fairies, older children of school examinations, hungry people of food, home-sick soldiers of their families and prisoners of freedom.

To show you how this is happening while you are asleep and how your needs and wishes can all be joined together in a dream, here is the story of the experiment. A man was asleep and the back of his hand was rubbed with a piece of absorbed cotton. He would dream he was in hospital and his charming girlfriend was visiting him, sitting on the bed and feeling gently his hands!

There are some scientists who have made a special study of why we dream, what we dream and what those dreams mean. Their explanation of dreams, though a bit reasonable, is not accepted by everyone but it offers an interesting approach to the problem. They believe that dreams are mostly expressions of wishes that did not come true. In other words dreaming is a way of having your wishes carried out.

31. From the passage we know that our dreams              .

A. are imagination of our daily life            B. are man’s curious look into the future

C. have nothing to do with our feelings    D. are to some degree connected with our feelings

32. In your dream when you feel like eating something it indicates（暗示）that             .

A. you are in a state of being cold          B. you are in a state of being tired

C. you are in a state of hunger            D. you should have had your dinner that day

33. Some scientists’ explanation of dreams              .

A. is not widely accepted though a bit reasonable    B. gives an exact description of our life

C. provides us with information of dreams                    D. is of no use for us

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In Canada and the United States, people enjoy entertaining(请客)at home. They often invite friends over for a meal, a party, or just for coffee and conversation.
Here are the kinds of things people say when they invite someone to their home:
" Would you like to come over for dinner on Saturday night? "
" Hey, we're having a party on Friday. Can you come'? "
To reply to an invitation, either say thank you and accept(接受), or say you're sorry and give an excuse(借口):
" Thanks, I'd love to. What time would you like me to come?" or " Oh, sorry. I've tickets for a movie." Sometimes, however, people use expressions(措辞)that sound like invitations, but which are not real invitations(邀请). For example:
" Please come over for a drink sometime? "
" Why not get together for a party sometime? "
"Why don't you come over and see us sometime soon?"
They are really just polite ways of ending a conversation. They are not real invitations because they don't tell time or date. They just show that the person is trying to be friendly. To reply to expressions like these, people just say: "Sure, that would be nice!" or "OK. Yes, thanks."
So next time when you hear what sounds like an invitation. Is it a real invitation or is the person just being friendly?
【小题1】 Why do Canadians and Americans often invite friends for meals at home?