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Introduction Guide to the Book Teaching Suggestions1

Unit 1 The Parts of a Plant and their Function12

Ⅰ：READING AND COMPREHENSION12

SOLUTIONS TO COMPREHENSION EXERCISE13

EXERCISE A:Contextual reference15

EXERCISE B:Rephrasing15

EXERCISE C:Relationships between statements: consequence16

Ⅱ：LANGUAGE IN USE17

EXERCISE A:Labelling a diagram17

EXERCISE B:The definition of parts of a plant17

EXERCISE C:General statements of function.18

Ⅲ：GRAMMAR19

EXERCISE A:The forms of definitions19

EXERCISE B:The impersonal.passive20

Ⅳ：SUMMARY CHECK23

Unit 2 The Life Cycle of a Plant24

Ⅰ：READING AND COMPREHENSION24

SOLUTIONS TO COMPREHENSION EXERCISE25

EXERCISE A:Contextual reference26

EXERCISE B:Rephrasing27

EXERCISE C:Relationships between statements:contrast27

Ⅱ：LANGUAGE IN USE28

EXERCISE A:Definitions of processes28

EXERCISE B:General statements of process29

EXERCISE C:Statements of function and process29

EXERCISE D:Definitions and descriptions of processes31

Ⅲ：GRANMAR36

EXERCISE A:Time expressions36

EXERCISE B:Expressions of degree38

Ⅳ：SUMMARY CHECK39

Unit 3 The Origin and Composition of Soil40

Ⅰ：READING AND COMPREHENSION40

SOLUTIONS TO COMPREHENSION EXERCISE41

EXERCISE A:Contextual reference43

EXERCISE B:Rephrasing43

EXERCISE C:Relationships between statements:exemplification and explanation44

Ⅱ：LANGUAGE IN USE45

EXERCISE A:Making tables from descriptions45

EXERCISE B:Writing ？escriptions from tables46

Ⅲ：GRAMMAR49

EXERCISE A:Comparative sentences49

EXERCISE B:Contrastive sentences51

EXERCISE C:Making comparisons by inference53

Ⅳ：SUMMARY CHECK55

Unit 4 Drainage and Irrigation56

Ⅰ：READING AND COMPREHENSION56

SOLUTIONS TO COMPREHENSION EXERCISE57

EXERCISE A:Contextual reference59

EXERCISE B:Rephrasing59

EXERCISE C:Relationships between statements:reinforcement and similarty60

Ⅱ：LANGUAGE IN USE61

EXERCISE A:Classification and definition61

EXERCISE B:Definition,description and identification63

EXERCISE C:Classification in diagrams and paragraphs64

EXERCISE D:Classification according to defining characteristics66

Ⅲ：GRAMMAR68

EXERCISE:to-infinitive for the expression of purpose68

Ⅳ：SUMMARY CHECK70

Unit 5 Manures and Fertilizers71

Ⅰ：READING AND COMPREHENSION71

SOLUTIONS TO COMPREHENSION EXERCISE73

EXERCISE A:Contexual reference74

EXERCISE B:Rephrasing75

EXERCISE C:Relationships between statements;review75

Ⅱ：LANGUAGE IN USE76

EXERCISE A:Conclusions based on observations76

EXERCISE B:Generalizations78

EXERCISE C:Recommendations78

EXERCISE D: Predictions79

Ⅲ：GRAMMAR82

EXERCISE A:Defining and non-defining relative clauses82

EXERCISE B:Short-form relative clauses84

Ⅳ：SUMMARY CHECK86

Unit 6 The Control of Weeds and PPlant Diseases87

Ⅰ：READING AND COMPREHENSION87

SOLUTIONS TO COMPREHENSION EXERCISE88

EXERCISE A:Contextual reference89

EXERCISE B:Rephrasing90

EXERCISE C:Relationships between statements90

Ⅱ：LANGUAGE IN USE90

EXERCISE A:The identification and description of diseases90

EXERCISE B:Recommendations93

Ⅲ：GRAMMAR96

EXERCISE A:Noun+noun constructions96

EXERCISE B:Participle+noun constructions97

EXERCISE C:complex noun phrases98

Ⅳ：SUMMARY CHECK99

Unit 7　Market Gardening101

Ⅰ：READING AND COMPREHEN SION101

EXERCISE A:Re-ordering paragraphs101

EXERCISE B:Adding statements102

EXERCISE C:Relationships between statements102

EXERCISE D:Contextual reference103

Ⅱ：LANGUAGE IN USE103

EXERCISE A:Directions and descriptions103

EXERCISE B:Direotions,descriptions and recommendations105

EXERCISE C:Drawing conclusions107

Ⅲ：GRAMMAR108

EXERCISE:Modal verbs110

Ⅳ：SUMMARIZING111

Unit 8 Animal Husbandry113

PASSAGES FOR COMPREHENSION113

PASSAGE Ⅰ:The Digestive System of Farm Animals113

PASSAGE Ⅱ:Food Requirements116

PASSAGE Ⅲ:Feedingstuffs119

PASSAGE Ⅳ:Reproduction120

PASSAGE Ⅴ:Breeding123