Unit six Text B L. Pre-Reading task 1. Have you ever heard of I. P. Pavlov, a famous Russian scientist? 2. /What was the important theory he developed? Now read the passage to learn more about PavlovText B I. Pre-Reading Task 1．Have you ever heard of I. P. Pavlov, a famous Russian scientist? 2．What was the important theory he developed? Now read the passage to learn more about Pavlov. Unit Six