UNIT ONE:THE PRESENT TENSE 1
chapter 1 Litter Is a Problem in Our Cities 2
chapter 2 People Work at Many Different Jobs 8
chapter 3 Handicapped People Do Useful Work 22
chapter 4 Hallowe'en Is a Holiday for Children 27
UNIT TWO:THE PRESENT CONTINUOUS TENSE 32
chapter 5 The Kites Are Flying High 33
chapter 6 Pollution Is Spoiling the Air You Breathe! 40
UNIT THREE:THE PRESENT PERFECT TENSES 47
chapter 7 This Woman Has Lost Her Job 48
chapter 8 It's Diffcult to Say Good-bye 54
chapter 9 Are Buses as Easy to Use as Cars? 60
UNIT FOUR:THE PAST TENSE 66
chapter 10 Lightning Struck the City Last Night 67
chapter 11 Rescue Workers Saved Four People 73
chapter 12 Dinosaurs Lived Many Years Ago 80
chapter13 Dry Land Farming:An Art and a Science 87
UNIT FIVE:THE PAST HABITUAL TENSES 92
chapter 14 Transportation Used to Be Much Slower 95
chapter 15 Thanksgiving on the Farm 101
UNIT SIX:THE PAST CONTINUOUS TENSE 106
chapter 16 When the Wall Fell In 107
UNIT SEVEN:THE PAST PERFECT TENSES 113
chapter 17 Nobody Had Believed It Was Possible 114
chapter 18 Husky Had Been Very Healthy 123
chapter 19 Luckily,I Had Been Wearing My Seatbelt 129
UNIT EIGHT:THE FUTURE TENSES 136
chapter 20 The Car of the Future 137
chapter 21 Helicopters to the Rescue! 145
UNIT NINE:THE FUTURE CONTINUOUS TENSE 154
chapter 22 When the Tornado Hits 155
UNIT TEN:THE FUTURE PERFECT TENSES 162
chapter 23 Pit Stop at the Race Track 163
chapter 24 Run for the Money 170
chapter 25 Too Little,Too Late 176