A computer can only do ____ you have instructed it to do

1. A.
   how
2. B.
   after
3. C.
   what
4. D.
   when

A computer ________ think for itself; it must be told what to do.

1. A.
   can't
2. B.
   couldn't
3. C.
   may not
4. D.
   might not

.A computer is so useful a machine ________ we can use everywhere.

 A. that   B. which  C. as  D. what

A computer does only what thinking people______.

A.have it do 　　　　                                     B.have it done

C.have done it　　　　                                    D.having it done

A computer is so useful a machine ________ we can use everywhere.

 A. that   B. which  C. as  D. what