This is the fourth book in the A Listening Course series．It has four sections in each of the 16 units：Tactics for Listening，Listening Comprehension，News，and Supplementary Exercises．

UNIT 1

UNIT 2

UNIT 3

UNIT 4

UNIT 5

UNIT 6

UNIT 7

UNIT 8

UNIT 9

UNIT 10

UNIT 11

UNIT 12

UNIT 13

UNIT 14

UNIT 15

UNIT 16