Passage 7 （福建省三明一中2010届高三上学期第二次月考） 完形填空

What causes your computer a slow one? The problem lies with changes that occur to the PC's software. The 2 most   51   causes of slowdown (along with easy solutions) are: Registry errors  -  the most common problem.

Every    52   you load a program, game or file, your PC's software registry is updated with new instructions needed to operate that item.   53   , when the item is removed, these instructions usually remain on your PC.  Every time you run your computer it   54   to carry out these instructions but, because the related program can't be found, it causes a registry error.  Your PC is doing a lot   55   work than it should be and the result is a significantly   56   computer.

One of the best ways to manage this is with a   57    little tool. This program scans, identifies and   58   registry errors - resulting in a computer that's a lot more like it was when you   59   bought it. 

Spyware and viruses

Spyware and viruses are software programs that are loaded on your computer   60   your knowledge or permission.  They have various purposes,    61   : 

Changing the default search engine in your browser ;

Tracking your web surfing    62   ;

Stealing your personal    63   .

Most spyware and viruses get onto our computers through files that we    64    from the internet or as attachments to emails. They tend to   65   up a lot of computing power and as a   66   will significantly slow down the computer.

The simple rule of thumb to follow is to never download any   67   software programs from companies you do not know and trust, especially screensavers, emoticons and the   68   . In addition, make sure you have a good anti-virus / spyware removal software running at   69    times.

Follow the above advice and your PC should stay fast and   70   .

51. A. common B. ordinary C. special D. normal

52. A. day B. week C. time  D. second

53. A. Although B. However C. Though D. And

54. A. costs B. keeps C. takes D. tries

55. A. more  B. much C. most D. least

56. A. faster B. slower  C. quicker D. stronger

57. A. easy B. funny C. neat  D. dull

58. A. finds B. sees C. fixes  D. stores

59. A. first  B. next C. last D. second

60. A. without  B. with C. between D. for

61. A. including B. includes C. included D. include

62. A. abilities B. habits  C. shortcomings D. faults

63. A. money B. possession C. happiness D. information 

64. A. read B. search C. write D. download 

65. A. make B. turn C. take D. cut

66. A. rule B. hobby C. result  D. start

67. A. free  B. cheap C. expensive D. useful

68. A. thing B. like C. difference D. interest

69. A. each B. every C. some D. all 

70. A. safe B. dangerous C. important D. useful

答案  51-70   ACBDA  BCCAA  ABDDC   CABDA