大学英语分级训练 一级PDF电子书下载

Practice One 1

Practice Two 7

Practice Three 13

Practice Four 19

Practice Five 26

Practice Six 33

Practice Seven 40

Practice Eight 47

Practice Nine 53

Practice Ten 59

Practice Eleven 65

Practice Twelve 72

Practice Thirteen 79

Practice Fourteen 86

Practice Fifteen 93

Practice Sixteen 99

Practice Seventeen 105

Practice Eighteen 111

KeyS to Book One 118