23（）

A. to send sample products from door to door
B. to familiarize the customers with the products
C. to deliver the products directly to the retail stores
D. to send information about the products in quick ways

A. the Cyrillic alphabet was invented for the Aleut language
B. all of the Cyrillic characters were used in writing the Aleut language
C. Russian and the Aleut language have some similar speech sounds
D. English is also written using the Cyrillic alphabet