●An instruction is made up of operations that __(66)__ the function to be performed and operands that represent the data to be operated on .For example ,if an instruction is to perform the operation of __(67)__ two numbers ,it must know __(68)__ the two numbers are .The processor's job is to __(69)__ instructions and operands from memory and to perform each operation .Having done that ,it signals memory to send it __(70)__ instruction.

(66):　A. skip 　B. smile 　C. smokeD. specify
(67):　A. addB. added 　C. adding 　D. addition
(68):　A. when 　B. where 　C. whichD. who
(69):　A. getB. makeC. push D. put
(70):　A. antB. lastC. next D. second
　
●software design is a __(71)__ process .It requires a certain __(72)__ of f1air on the part of the designer. Design can not be learned from a book .It must be practiced and learnt by experience and study of existing systems .A well __(73)__ software system is straightforward to implement and maintain ,easily __(74)__ and reliable .Badly __(73)__ software systems ,although they may work are __(75)__ to be expensive to maintain ,difficult to test and unreliable.

(70):　A. createB. created C. creatingD. creative
(72):　A. amount B. amounted ` C. mount 　D. mounted
(73):　A. design B. designedC. designing 　D. designs
(74):　A. understand B. understands C. understanding　 D. understood
(75):　A. like B. likely C. unlike　D. unlikely

[1]  [2]  [3]  [4]  [5]  [6]  [7]  [8]