Part One Units 1~2 1
Part Two Units3~4 8
Part Three Units5~6 17
Part Four Units7~8 26
Part Five Units9~10 35
Part Six Units11~12 41
Part Seven Units13~14 49
Part Eight Units15~16 57
Part Nine Units17~18 66
Part Ten Units19~20 75
Part Eleven Units21~22 83
Part Twelve Units23~24 92
Part Thirteen Units25~26 101
参考答案 109
有用的词汇和短语 131