Question

We bet that on cold wintry days, many of you love to stay in your warm home and, every now and then，come out into the kitchen for a snack. Unfortunately, plenty of creepy-crawly critters (爬行生物) like to do the same thing!

Winter is the time when bugs (虫子) invade your house without an invitation. The season can be tough for such creatures. In winter the air is cold, the ground is hard and many trees have no leaves. So bugs do what they have to do to survive.

Monarch butterflies head south to warmer climates. Ants crowd in deep underground colonies and eat food they have been storing all year. Many insects go into a deep sleep called diapauses. There’ re different kinds of diapauses, but all are similar to hibernation, a time when bigger animals become inactive in the cold. Insects go into an inactive period, too, but it often isn’t when the temperature drops.

They rely on more dependable signals in the environment. For example, many insects can tell how much sunlight there’ s each day. They use that to tell themselves when to shut down. Bugs are cold-blooded, meaning that their inside temperature is the same as the outside. They can’ t move much when it gets below 40 degrees Fahrenheit. So they search for any warm place.

They’ re looking for protection. These guys have been doing this for 300 million years, so they don’ t really know they’ re coming into your house. The home is a recent event in terms of their evolutionary behavior. They enter through tiny cracks or come in unnoticed on your clothes or shoes. Remember that they may be invading your homes for warmth and food, but they don’t care about humans.

46. What is the purpose of the first paragraph?

A. To point out that humans like to stay at home in winter.

B. To mean that humans and bugs have the same living habits.

C. To mean that bugs will invade humans’ houses for their winter.

D. To put forward the idea that bugs are not welcome in winter.

47. According to the text, what is diapauses?

A. It is the same as the animals’ hibernation.

B. It often appears in warm areas all the year.

C. It is done to keep bugs active in winter.

D. It is a deep sleep similar to hibernation.

48．What often decides bugs’ diapauses?

A. The lower local temperature.        B. The amount of sunlight.

C. Kinds of environmental signals.      D. The insects’ inside temperature.

49．According to the text, bugs invade humans’ homes to________.

A. attack humans            B. look for enough food

C. seek for protection         D. show their evolutionary results

50．What would be the best title for the text?

A. Bugs’ life on cold wintry days.         

B. Why do bugs invade your home in winter?

C. Good relations between humans and bugs. 

D. What does diapauses mean?

                                 

Answer 1

　本文主要介绍的是：为什么虫子在冬天会入侵人类住所。

46. C　推理判断题。根据文章第一段可知，虫子和人类一样，也会喜欢待在温暖的屋里，再结合文章的后面几段可知，本段暗示虫子在冬天会入侵人类住所。

47．D　细节理解题。根据文章第三段可知答案为D。

48．C细节理解题。根据文章第四段的“They rely on more dependable signals in the environment”可知，虫子的“diapauses”是由多种环境可依赖性因素决定的，不一定全靠温度或者光照。

49．C 细节理解题。根据文章最后一段可知，虫子进屋是为了寻求保护，把自己置身于安全形势之下，而不仅仅是为了寻求食物。

50．B 标题概括题。整篇文章主要告诉读者的是：在冬天里，为什么虫子会入侵人类的住所。