6．Not all vegetables need lots of sunshine．Mark Hoffman and his wife，Guia，own a bed-and-breakfast guesthouse in rural Kempton，Illinois．They often serve their guests fresh vegetables from the garden．
The Hoffmans have been growing food and flowers for twenty-five years．For almost ten of those years，Mr．Hoffman has been experimenting and working with shade plantings．He says visitors to his website-greenhousebed．com-often ask how to plant in shade spaces．He said，"The bottom line here is that most plants will produce more in full sun．But if you do not have full sun，there are other options．"
For example，he grows tomatoes near oak trees．Oak trees can produce a lot of shade．But Mr．Hoffman says his tomato plants grow as long as they get five hours a day of direct sunshine，especially morning sun．Not only does this go against the traditional advice that tomatoes need six，eight，even twelve hours a day of full sun，it also shows how plants and tree roots can share nutrients and water．Mr．Hoffman also planted asparagus around a tree at its drip line，the area below the outer limit of the branches．So when it rains，all the rain drips down right on the asparagus．
The Hoffmans'website includes a list of vegetables，flowers and herbs that have produced acceptably for them in partial shade．Mr．Hoffman says plants with wider leaves seem to do better in shady environments．He also found that his potatoes did better in partial shade than in full sun．
Moving them out of the sun helped control an insect problem with leaf hoppers．Mr．Hoffman does not use pesticides （农药）．Instead，he planted the potatoes at the drip line，especially on the east side of the tree．The potatoes get morning sun，but they are shaded during the hottest part of the day．Leaf hoppers dislike shade，and the hottest part of the day is when they do the worst of their damage．
Time of day，brightness of the sun，shadows from trees，walls and buildings，these all influence how much sunlight falls or does not fall on plants．And extension agent Curtis Swift at Colorado State University says people interested in shade planting should also remember something else．The term"shade"can describe different amounts of darkness．He says it can even mean different things in different parts of the world．
28．What's the author's purpose of writing the passage？A
A．To show vegetables can be planted in the shade．
B．To recommend an approach to managing a website．
C．To present a kind of eco-friendly lifestyle．
D．To introduce Mark Hoffman and his family．
29．What can we infer from the second paragraph？C
A．Food and flowers produce more in the shade．
B．Food growing in the shade contains more nutrients．
C．Sun can affect the production of some plants．
D．Food growing in the shade is the best choice for most plants．
30．By using asparagus as an example，the author wants to explain thatB．
A．asparagus prefers to grow in the shade
B．how plants and tree roots share water
C．vegetables grow better in partial shade
D．how leaves gain sunshine under the tree
31．The underlined words"leaf hoppers"in Para five may be a kind ofC．
A．plans
B．pesticides
C．insects
D．potatoes．
分析 本文主要介绍了可以在阴暗处种植，以及如何种植的一些植物．
解答 28．A 主旨大意题．综观全文以及由本文的第一句"Not all vegetables need lots of sunshine．"可知本文主要讲述了一些蔬菜可种在遮阴处．故选A．
29．C 推理判断题．由第二段Hoffman所说的话"The bottom line here is that most plants will produce more in full sun．"可推出阳光会影响一些植物的产量．故选C．
30．B 细节理解题．由第三段第五句"It also shows how plants and tree roots can share nutrients and water．"它还表明，植物和树根可以共享营养和水分，可知故选B．
31．C 推理判断题．由第五段第一句"Moving them out of the sun helped control an insect problem with leaf hoppers．"以及本段后面提到leaf hoppers不喜阴，可推出这应该是一种昆虫．故选C．
点评 做这类题材阅读理解时要求考生对文章通读一遍，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
