potatoes came from the Americas
Remember that the distances involved were great, further than the distance from Europe to the closest place in the Americas
a few American Indians could have reached Easter Island, because of a storm, and brought the seeds of sweet potatoes with them BDACD ADDDC ABCCC
Unit 7
Basic listening AADBC Listening in > Task 1 DCAAB Task 2 DCAAB Task 3
rest Sunday industrial revolution God
six-day work week late 19th and early 20th relaxation
great boon consumer spending Second World War two days do not work religious activities Let's talk >Task 1
held back transport highest subsistence lower
2,000-kilometer minerals potential development
number one tourism only two landscapes fascinating
commuting tourist ruined history traditional mistakes
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Further listening and speaking Further listening > Task 1 AABBB Task 2 CABBD Task 3 ABCDC Viewing and speaking Task 1
book search engines real customers judge 250 pounds two days / 2 days partying click targeting
Unit test 7
CABDD when
competitiveness unmanned regularly extra households Previously
To serve these new shoppers it is also necessary for more stores to remain open and thus more people to work on weekends
Weekends are days when people can safely sleep in and also not have to worry as much about the ill effects of a hangover
One area in which the weekend has remained unaffected is education.
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where schools are shut on Saturdays and Sundays CABDD
CACDB AACBB
Unit 8
Lead in Task1 c a f d g b e
Task2 GM crops stem cell genetic map cloning Basic listening BCDAC Listening in Task 1 BAAAD Task 2
1.Research 2.genes 3.journal 4.warn 5.productivity 6.grow 7.survival
8.Plant breeders have already used preliminary information from the rice genome to create experimental strains of rice that better resist cold and pests
9.The new map could better explain more than just rice. Rice shares a common ancestor with other cereal crops
10.While significant progress has been made in the analysis of the rice genome, the mapping of the human genes is also making headway Task 3 CBDAD Let’s talk
kitchens opposed labeled completely law no way
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GM ingredients choice Tougher any content the public fear safer naturally cheap decide
Further listening
Task 1 biotechnology rejected special labels
73 percent to 27 percent / 73% to 27% a new type of tomato against save lives improve the human condition medicines conventional foods Task 2 AABBA Task 3 DBACC
trees native genes black onion taste poisonous tested toxic fish popular bigger food normally larger threefold genes originally
different risks laboratory environment
Unit test 8
CBDBD
yield identify central abnormal how to signals
The most important potential application of human stem cells is perhaps the generation of cells and tissues
Stem cells, directed to differentiate into specific cell types, will offer a source of replacement cells and tissu
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