课文 1
UNIT ONE(第一单元) 1
Lesson One 1
Lesson Two 6
Lesson Three 10
Lesson Four 16
Lesson Five 21
Lesson Six 26
Lesson Seven 31
Lesson Eight 37
Lesson Nine 42
Lesson Ten 48
UNIT TWO(第二单元) 54
Lesson Eleven 54
Lesson Twelve 60
Lesson Thirteen 69
Lesson Fourteen 75
Lesson Fifteen 84
Lesson Sixteen 91
Lesson Seventeen 98
Lesson Eighteen 106
Lesson Nineteen 115
Lesson Twenty 122
UNIT THREE(第三单元) 130
Lesson Twenty-one 130
Lesson Twenty-two 136
Lesson Twenty-three 143
Lesson Twenty-four 150
Lesson Twenty-five 157
Lesson Twenty-six 163
Lesson Twenty-seven 171
Lesson Twenty-eight 178
Lesson Twenty-nine 184
Lesson Thirty 191
补充阅读材料 198
1.Keep Your Food Safe 198
2.Air Pollution 199
3.The Effects of Alcohol on You 201
4.Be Careful When Lifting Things 202
5.A Sad Story 204
6.To Live and Work Under the Ocean 205
7.Food and Drugs That Do Not Mix 206
8.Keep Good Digestion 208
9.The Sun 209
10.No More Smoking! 211
总词汇表 214
练习答案与参考译文 252
第一部分 课文及语法练习答案 252
Lesson One 252
Lesson Two 252
Lesson Three 252
Lesson Four 253
Lesson Five 253
Lesson Six 254
Lesson Seven 255
Lesson Eight 255
Lesson Nine 256
Lesson Ten 257
Lesson Eleven 258
Lesson Twelve 259
Lesson Thirteen 260
Lesson Fourteen 261
Lesson Fifteen 262
Lesson Sixteen 263
Lesson Seventeen 265
Lesson Eighteen 266
Lesson Nineteen 267
Lesson Twenty 269
Lesson Twenty-one 270
Lesson Twenty-two 271
Lesson Twenty-three 272
Lesson Twenty-four 274
Lesson Twenty-five 275
Lesson Twenty-six 276
Lesson Twenty-seven 277
Lesson Twenty-eight 279
Lesson Twenty-nine 280
Lesson Thirty 281
第二部分 课文及阅读材料参考译文 283
Lesson One 283
Lesson Two 283
Lesson Three 284
Lesson Four 285
Lesson Five 286
Lesson Six 287
Lesson Seven 288
Lesson Eight 289
Lesson Nine 290
Lesson Ten 291
Lesson Eleven 292
Lesson Thirteen 293
Lesson Twelve 293
Lesson Fourteen 294
Lesson Fifteen 295
Lesson Sixteen 296
Lesson Seventeen 297
Lesson Eighteen 297
Lesson Nineteen 298
Lesson Twenty 299
Lesson Twenty-one 300
Lesson Twenty-two 301
Lesson Twenty-three 301
Lesson Twenty-four 302
Lesson Twenty-five 303
Lesson Twenty-six 304
Lesson Twenty-seven 305
Lesson Twenty-nine 306
Lesson Twenty-eight 306
Lesson Thirty 307
第三部分 补充阅读材料练习答案 308
第四部分 补充阅读材料参考译文 309
1. 309
2. 309
3. 309
4. 310
5. 310
6. 310
7. 311
8. 311
9. 311
10. 312