I'm planning my summer vacation．I don't know what kind of holiday I should have------a lazy one or an exciting one．Last year，I went to southern Spain with my best friends Joanna and Ling．We stayed in an excellent hotel，which had three swimming pools．It was quite expensive but we really enjoyed ourselves．
This year，Joanna is going to Greece with her parents．So it'll be just Ling and me．Ling wants us to go on an adventure （冒险） holiday in Africa，and we will walk in the desert （沙漠） and sleep out in the open．She said it would be interesting and better than having a lazy holiday because we would learn about the world around us．I'm not sure where to go．
For me，a holiday means relaxing on a beach，not walking across the desert．Ling said she'd like to see elephants and lions and have some wonderful experiences．I think she's bored of lying in the sun all day and wants to have a change．It would cost each of us $ 1，400to go to Africa，but less than half that amount （金额） to go to Portugal for two weeks．Which one should I choose？
71．Where did the writer and her friends go during the last summer vacation？
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72．Why can't Joanna go on holiday with the writer this year？
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73．What kind of holiday does Ling want this year？
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74．Did the writer and her friends have a good vacation last year？
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75．How much would it cost the writer to stay in Portugal for two weeks？
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