走遍美国初级教程PDF电子书下载

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Contents 4

Program D“Later...” 4

Segment 1 5

Segment 2 6

Segment 3 8

Segment 4 10

Segment 5 11

Review 14

Program E“&All the Time” 17

Segment 1 18

Segment 2 19

Segment 3 21

Segment 4 23

Review 26

Program F“Remember？” 30

Segment 1 31

Segment 2 34

Segment 3 36

Segment 4 37

Review 41

练习答案 45

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