包邮8天轻松拿下托福写作-超简单-(含光盘)

contents
unit 01 food science
integrated gm food 8
independent food made in a restaurant vs. homemade food 16
unit 02 health
integrated obesity 26
independent fast-food sales 34
unit 03 zoology
integrated fish farming 44
independent the purpose of a zoo 52
unit 04 international relation
integrated poverty 62
independent foreign aid 70
unit 05 sociology
integrated exploding world population 80
independent an extended family vs. a nuclear family 88
unit 06 mystery
integrated crop circles 98
independent science fiction 106
unit 07 environment
integrated biofules 116
independent the earth and human activities 124
unit 08 technology
integrated online shopping 134
independent printed books vs. e-books 142
check-up grammar 151
actual test 160
answer keys & listening script 163