C
　　Many years ago,my mother grew some plants on the balcony(阳台).As spring came,some flowers came out.I enjoyed looking at them very much.They were so beautiful,but they didn't give out any scent(香味).How could I help them smell as good as they looked?After thinking about the problem for a few days,I had a good idea..
　　One day,when my parents were not at home,I picked a bottle of perfume e(香水)from my mother's dressing table.Then I opened the bot t lle cap and poured some perfume onto the plants.I was very happy that I helped make my lovely
flowers become better.But to my surprise,a few days later,I noticed the flow-ers fell.Slowly,before summer arrived,even the plants died.I cried and I knew I did something wrong.
　　Later,my mother told me the r ē as on.She said the perfume was really bad for plants.Some beautiful flowers just have no scent at all.We can't change it as we like.Everything in life follows the rules of nature.We should not put our ideas into practice before we learn about the rules of nature.What a lesson !
()27.Who grew some plants on the balcony?
A.The writer's father.B.The writer's mother.
C.The writer's grandmother..D.The writer.
()28.What happened to the flowers after the writer poured some perfume
　　　　onto the plants?
A.They smelt as usual.B.They gave out scent.
C.They fell.D.They grew better.
()29.When did the plants die?
A.Before summer arrived.B.In summer.
C.Before winter arrived.D.In winter.
()30.What can we learn from the passage?
A.Flowers come out in spring.
B.Don't pick up flowers.
C.Protect plants as we can.
D.Everything in life follows the rules of nature.

27. B 28. C 29. A 30. D