PartⅠ
Lead-in

1 . Look at the pictures and have a discussion about them. Then produce the possible words and expressions that are related to the theme.

Writedown the relevantwords an dexpressions in the spaceprovidedbelow. ________________________________________________________________

2 . Listen to the passage and then fill in the blanks with the exact words or phrases you have just heard.

A computer is a general purpose device that can be programmed to carry out a set of________or logical operations automatically. Since a sequence of_______can be readily changed，the computer can solve more than one kind of problem.

Conventionally，a computer consists of at least one________element，typically a Central Processing Unit(CPU)，and some form of_______. The processing element carries out arithmetic and logic operations，and a sequencing and control unit can change the order of operations in response to stored information. Peripheral devices allow_______to be retrieved from an external source，and the result of operations saved and retrieved. kk1MAPQZDPwTDJcM80IzLtLq/XyMc/i4VTxBQg5TozO1IzdYOInOcOtcf5tIZ+iG