2012年6月英语六级名师密押卷及答案(2)

 　　PartⅣ Reading Comprehension(Reading in Depth) (25 minutes)
　　Section A
　　Directions：In this section,there is a short passage with 5 questions or incomplete statements．Read the passage carefully．Then answer the questions or complete the statements in the fewest possible words on Answer Sheet2．
　　Questions47 to 51 are based on the following passage.
 

　　注意：此部分试题请在答题卡2上作答。
　　47．According to the discoveries of the astronomers，when did galaxies form?
　　48．Why can astronomers age galaxies by computing how much the wavelength of their light has stretched?
　　49．The comparative rarity of IOK-1 means that significant changes must have occurred in the universe over the 60 million years that____________________________.
　　50．What happened when the ionized hydrogen became more transparent?
　　51．According to the passage,the“hierarchical”theory of galaxy formation suggests that big，bright galaxies formed as_________________________.
　　Section B
　　Directions：There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked[A],[B]，[C]and[D]．You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the center.
　　Passage One
　　Questions52 to 56 are based on the following passage.
 

　　注意：此部分试题请在答题卡2上作答。
　　52．Effective communication is rendered possible between two conversing partners if_________.
　　[A]they use proper words to carry their ideas
　　[B]they both speak truly of their own feelings
　　[C]they try to understand each other’s ideas beyond words
　　[D]they are capable of associating meaning with their words
　　53．“I’m letting off some steam”(Line 5，Para.1)means__________.
　　[A]I’m just calling your attention
　　[B]I’m just saying what I don’t really want to say
　　[C]I’m just saying the opposite
　　[D]I’m just giving off some sound
　　54．The house-owner’s example shows that he actually means___________.
　　[A]the step has been like that for years
　　[B]he doesn’t think it necessary to fix the step
　　[C]the condition of the step is only a minor fault
　　[D]the cost involved in the fixing should be shared
　　55．Some responses and behaviors may appear very illogical，but are justifiable if_____________.
　　[A]linked to all abnormal amount of assertiveness
　　[B]seen as one’s habitual pattern of behavior
　　[C]taken as part of an ordering sequence
　　[D]expressed to a series of charges
　　56. The word“ritualistically”in the last paragraph equals something done________. [A]kind-heartedly
　　[B]light-heartedly
　　[C]in a way of ceremony
　　[D]with less emphasis
　　Passage Two
　　Questions57 to 61 are based on the following passage.
 

　　注意：此部分试题请在答题卡2上作答。
　　57．The problem that has been annoying cancer researchers for years is the difficulty in telling______________.
　　[A]how cancer cells are formed
　　[B]why cancer cells never stop dividing
　　[C]why normal cells can turn into cancer cells
　　[D]how different normal cells are from cancer cells
　　58．Whitehead’s scientists have succeeded in__________.
　　[A]developing malignant cells in human bodies
　　[B]making normal human cells cancerous
　　[C]controlling the change of human cells
　　[D]changing the genes of cancer cells
　　59．In the 1983 experiment，human cells didn’t work the way mouse cells did because the former________.
　　[A]were easier to become aged
　　[B]checked telomerase in dividing
　　[C]had short ends of chromosomes
　　[D]lacked telomeres for cell division
　　60．To make human cells more mouselike scientists tried________.
　　[A]to subject them to two more genes
　　[B]to keep the division from slowing down
　　[C]to promote the production of telomerase
　　[D]to prevent excessive cells copying
　　61．One key factor in creating tumor wim human cells is___________.
　　[A]lengthening the ends of chromosomes
　　[B]altering the structure of telomeres
　　[C]increasing the levels of telomerase
　　[D]modulating the cell dividing process