To copy files that match on several characters:
cp *.txt chapt1
This copies all the files in the current working directory with the extension ".txt" to the sub-directory chapt1.
To copy files that match on a single character:
cp sect?b partA
This copies any file with the name sect[1-9]b to the sub-directory partA.
To copy all the files within a specified range:
cp sect[1-4]c partB
This copies files sect1c, 2c, 3c and sect4c to the sub-directory partB.