从下面提供的答案中选出应填入下列英文语句中______内的正确答案。 The computer itself does not do all t

从下面提供的答案中选出应填入下列英文语句中______内的正确答案。

The computer itself does not do all the work on its own. The work is done by a(1)of the computer, called hardware, and(2)ofinstructions, called software or computer programs. Inside the machine, the instructions are(3)and carried out to do the work you want to do. A computer without software is nothing more than a mass of metal and plastic. On the other hand, software without a computer is simply wasted(4)because only the computer can use the software and put it to work. When you talk about a computer's being able to do this or that, you are really refemng to the(5)that accepts your commands and the computer that carries them out.