《大学英语·精读》 修订本 同步训练 第4册PDF电子书下载

Unit One 1

Big Bucks the Easy Way 1

Unit Two 23

Deer and the Energy Cycle 23

Revision Exercises 1 43

Unit Three 66

Why Do We Believe That the Earth Is Round? 66

Jim Thorpe 84

Unit Four 84

Revision Exercises 2 110

Unit Five 135

To Lie or Not to Lie--The Doctor s Dilemma 135

Unit Six 157

How to Mark a Book 157

Revision Exercises 3 173

Unit Seven 198

The Luncheon 198

The New Cave 217

Unit Eight 217

Revision Exercises 4 229

Unit Nine 254

Journey West 254

Unit Ten 275

Why People Work 275

Revision Exercises 5 298

Test Paper 1 322

Test Paper 2 343

Keys to Revision Exercises 1 363

Appendix I 363

Keys to Revision Exercises 2 365

Keys to Revision Exercises 3 368

Keys to Revision Exercises 4 370

Keys to Revision Exercises 5 372

Appendix Ⅱ 376

Keys to Test Paper 1 376

Keys to Test Paper 2 378