outdoor plants. Plants that ordinarily cannot grow in colder outdoor weather can be protected by the inside spaces, where temperatures are easily controlled. Plants that used to be found only outside, such as trees, have become more and more popular as decorations inside houses. Orchids(4E), which were once only found in hot places, have begun to grow well in inside places. a large number of smaller plants have also found their way into homes One reason that the modern home has made exotic(引进的) outdoor plants more practical is the modem use of windows. In the past windows were used less often n buildings than they are today. It is partly because of the ability of large windows to admit a large quantity of light from the sun and to keep the heat in at the same time that many outdoor plants have been able to make their move inside It is true that most of the plants that have been successful in mov ing inside have been small! Some of the best suited varieties are the vines(藤本植物)Many vines that grow in natural locations make excellent decorations where other plants prove difficult to grow. Although some trees can be grown inside, it is not likely the larger varieties can be used. Unfortunately, most homes just don't have the space to grow a monkey tree 31. The passage is mainly concerned with A)the ability of large windows B)the difficulty of moving monkey trees into hor C) growing plants inside houses D)the best suited trees 32. It is implied or suggested in the passage that A)the inside environment can protect plants better B)people like to use plants as decorations in their houses C)people move plants into their houses to save them D)the uses of windows in the past were not practicaloutdoor plants. Plants that ordinarily cannot grow in colder outdoor weather can be protected by the inside spaces, where temperatures are easily controlled. Plants that used to be found only outside, such as trees, have become more and more popular as decorations inside houses. Orchids (兰花), which were once only found in hot places, have begun to grow well in inside places. A large number of smaller plants have also found their way into homes. One reason that the modern home has made exotic (引进的) outdoor plants more practical is the modern use of windows. In the past windows were used less often in buildings than they are today. It is partly because of the ability of large windows to admit a large quantity of light from the sun and to keep the heat in at the same time, that many outdoor plants have been able to make their move inside. It is true that most of the plants that have been successful in moving inside have been small. Some of the best suited varieties are the vines (藤本植物). Many vines that grow in natural locations make excellent decorations where other plants prove difficult to grow. Although some trees can be grown inside, it is not likely the larger varieties can be used. Unfortunately, most homes just don't have the space to grow a monkey tree. 31.The passage is mainly concerned with ________. A) the ability of large windows B) the difficulty of moving monkey trees into homes C) growing plants inside houses D) the best suited trees 32.It is implied or suggested in the passage that ________. A) the inside environment can protect plants better B) people like to use plants as decorations in their houses C) people move plants into their houses to save them D) the uses of windows in the past were not practical