Part One Units 1~2 1
Part Two Units 3~4 10
Part Three Units 5~6 22
Part Four Units 7~8 30
Part Five Units 9~10 40
Part Six Units 11~12 50
Part Seven Units 13~14 60
Part Eight Units 15~16 69
Part Nine Units 17~18 80
Part Ten Units 19~20 91
Part Eleven Units 21~22 103
Part Twelve Units 23~34 115
Part Thirteen Units 25~26 127
Useful Expressions 127
Part Fourteen Units 27~28 140
Part Fifteen Units 29~30 153
参考答案 166