21.   On Thursday, the Home Ministry made a single copy available to members of Parliament.

22.   One of his most popular vignettes was for the Playboy Corp., but the certificate was discontinued after fans began collecting expensive single copies.

23.   People who inherit a single variant copy of the fever gene from one parent and a normal copy from the other parent have no sign of the disease.

24.   Poster collectors complained that the gaily colored abstract pattern held no message and was executed as a single copy instead of in multiples, as usual.

25.   Patients or family members can get single copies of both booklets free.

26.   Single copies are distributed free.

27.   Single copies are available free from chapters of the heart association.

28.   Single copy sales of the paper were flat, he said.

29.   Software users are allowed to make a single backup copy of a program for their personal use.

30.   Single copies are free.