Lesson One 1
[重点提要] 1
[跟踪测试] 1
Lesson Two 13
[重点提要] 13
[跟踪测试] 13
Lesson Three 26
[重点提要] 26
[跟踪测试] 26
Lesson Four 38
[重点提要] 38
[跟踪测试] 38
Lesson Five 49
[重点提要] 49
[跟踪测试] 49
Lesson Six 58
[重点提要] 58
[跟踪测试] 58
Lesson Seven 68
[重点提要] 68
[跟踪测试] 68
Lesson Eight 79
[重点提要] 79
[跟踪测试] 79
Lesson Nine 90
[重点提要] 90
[跟踪测试] 90
General Revision for Lesson1—9 101
Lesson Ten 114
[重点提要] 114
[跟踪测试] 114
Lesson Eleven 124
[重点提要] 124
[跟踪测试] 124
Lesson Twelve 136
[重点提要] 136
[跟踪测试] 136
Lesson Thirteen 146
[重点提要] 146
[跟踪测试] 146
Lesson Fourteen 159
[重点提要] 159
[跟踪测试] 159
Lesson Fifteen 169
[重点提要] 169
[跟踪测试] 169
Lesson Sixteen 179
[重点提要] 179
[跟踪测试] 179
Lesson Seventeen 187
[重点提要] 187
[跟踪测试] 187
Lesson Eighteen 199
[重点提要] 199
[跟踪测试] 199
General Revision for Lesson 10—18 212
注释和参考答案 222
Lesson One 222
1.答案 222
2.注释 222
Lesson Two 225
1.答案 225
2.注释 226
Lesson Three 229
1.答案 229
2.注释 230
Lesson Four 233
1.答案 233
2.注释 233
Lesson Five 236
1.答案 236
2.注释 237
Lesson Six 240
1.答案 240
2.注释 241
Lesson Seven 243
1.答案 243
2.注释 244
Lesson Eight 245
1.答案 245
2.注释 245
Lesson Nine 248
1.答案 248
2.注释 249
General Revision for Lesson 1 —9 253
1.答案 253
Lesson Ten 254
1.答案 254
2.注释 254
Lesson Eleven 257
1.答案 257
2.注释 258
Lesson Twelve 260
1.答案 260
2.注释 261
Lesson Thirteen 264
1.答案 264
2.注释 264
Lesson Fourteen 269
1.答案 269
2.注释 270
Lesson Fifteen 273
1.答案 273
2.注释 273
Lesson Sixteen 276
1.答案 276
2.注释 276
Lesson Seventeen 280
1.答案 280
2.注释 280
Lesson Eighteen 283
1.答案 283
2.注释 284
General Revision for Lesson 10—18 287
1.答案 287