Introduction Guide to the Book Teaching Suggestions 1
Unit 1 The Parts of a Plant and their Function 12
Ⅰ：READING AND COMPREHENSION 12
SOLUTIONS TO COMPREHENSION EXERCISE 13
EXERCISE A:Contextual reference 15
EXERCISE B:Rephrasing 15
EXERCISE C:Relationships between statements: consequence 16
Ⅱ：LANGUAGE IN USE 17
EXERCISE A:Labelling a diagram 17
EXERCISE B:The definition of parts of a plant 17
EXERCISE C:General statements of function. 18
Ⅲ：GRAMMAR 19
EXERCISE A:The forms of definitions 19
EXERCISE B:The impersonal.passive 20
Ⅳ：SUMMARY CHECK 23
Unit 2 The Life Cycle of a Plant 24
Ⅰ：READING AND COMPREHENSION 24
SOLUTIONS TO COMPREHENSION EXERCISE 25
EXERCISE A:Contextual reference 26
EXERCISE B:Rephrasing 27
EXERCISE C:Relationships between statements:contrast 27
Ⅱ：LANGUAGE IN USE 28
EXERCISE A:Definitions of processes 28
EXERCISE B:General statements of process 29
EXERCISE C:Statements of function and process 29
EXERCISE D:Definitions and descriptions of processes 31
Ⅲ：GRANMAR 36
EXERCISE A:Time expressions 36
EXERCISE B:Expressions of degree 38
Ⅳ：SUMMARY CHECK 39
Unit 3 The Origin and Composition of Soil 40
Ⅰ：READING AND COMPREHENSION 40
SOLUTIONS TO COMPREHENSION EXERCISE 41
EXERCISE A:Contextual reference 43
EXERCISE B:Rephrasing 43
EXERCISE C:Relationships between statements:exemplification and explanation 44
Ⅱ：LANGUAGE IN USE 45
EXERCISE A:Making tables from descriptions 45
EXERCISE B:Writing ？escriptions from tables 46
Ⅲ：GRAMMAR 49
EXERCISE A:Comparative sentences 49
EXERCISE B:Contrastive sentences 51
EXERCISE C:Making comparisons by inference 53
Ⅳ：SUMMARY CHECK 55
Unit 4 Drainage and Irrigation 56
Ⅰ：READING AND COMPREHENSION 56
SOLUTIONS TO COMPREHENSION EXERCISE 57
EXERCISE A:Contextual reference 59
EXERCISE B:Rephrasing 59
EXERCISE C:Relationships between statements:reinforcement and similarty 60
Ⅱ：LANGUAGE IN USE 61
EXERCISE A:Classification and definition 61
EXERCISE B:Definition,description and identification 63
EXERCISE C:Classification in diagrams and paragraphs 64
EXERCISE D:Classification according to defining characteristics 66
Ⅲ：GRAMMAR 68
EXERCISE:to-infinitive for the expression of purpose 68
Ⅳ：SUMMARY CHECK 70
Unit 5 Manures and Fertilizers 71
Ⅰ：READING AND COMPREHENSION 71
SOLUTIONS TO COMPREHENSION EXERCISE 73
EXERCISE A:Contexual reference 74
EXERCISE B:Rephrasing 75
EXERCISE C:Relationships between statements;review 75
Ⅱ：LANGUAGE IN USE 76
EXERCISE A:Conclusions based on observations 76
EXERCISE B:Generalizations 78
EXERCISE C:Recommendations 78
EXERCISE D: Predictions 79
Ⅲ：GRAMMAR 82
EXERCISE A:Defining and non-defining relative clauses 82
EXERCISE B:Short-form relative clauses 84
Ⅳ：SUMMARY CHECK 86
Unit 6 The Control of Weeds and PPlant Diseases 87
Ⅰ：READING AND COMPREHENSION 87
SOLUTIONS TO COMPREHENSION EXERCISE 88
EXERCISE A:Contextual reference 89
EXERCISE B:Rephrasing 90
EXERCISE C:Relationships between statements 90
Ⅱ：LANGUAGE IN USE 90
EXERCISE A:The identification and description of diseases 90
EXERCISE B:Recommendations 93
Ⅲ：GRAMMAR 96
EXERCISE A:Noun+noun constructions 96
EXERCISE B:Participle+noun constructions 97
EXERCISE C:complex noun phrases 98
Ⅳ：SUMMARY CHECK 99
Unit 7 Market Gardening 101
Ⅰ：READING AND COMPREHEN SION 101
EXERCISE A:Re-ordering paragraphs 101
EXERCISE B:Adding statements 102
EXERCISE C:Relationships between statements 102
EXERCISE D:Contextual reference 103
Ⅱ：LANGUAGE IN USE 103
EXERCISE A:Directions and descriptions 103
EXERCISE B:Direotions,descriptions and recommendations 105
EXERCISE C:Drawing conclusions 107
Ⅲ：GRAMMAR 108
EXERCISE:Modal verbs 110
Ⅳ：SUMMARIZING 111
Unit 8 Animal Husbandry 113
PASSAGES FOR COMPREHENSION 113
PASSAGE Ⅰ:The Digestive System of Farm Animals 113
PASSAGE Ⅱ:Food Requirements 116
PASSAGE Ⅲ:Feedingstuffs 119
PASSAGE Ⅳ:Reproduction 120
PASSAGE Ⅴ:Breeding 123