Listen and follow along in your books as the following series of numbers are read on the tape. Now listen again, with your books closed. Repeat after the speaker.
a.
15-12-14-13-11-16-19-18-17-20
20-15-17-12-18-14-19-13-16-11
18-12-17-15-20-11-13-16-19-14
b.
2-10--19-12-6-16-8-20-11-13
20-12-14-19-17-4-15-7-1-16
1-11-2-12-19-20-3-13-17-18