人教新课标必修四UNIT2Working the land课下作业

III. 1. thanks to 3. would rather

2. was satisfied with

IV. 1. without 2. crops 3. on 4. raised 5. living

6. remains

7. occupation 10. reduced

8. Scientific 9. productive

Learning about Language

I. 1. confuse 2. regretted 4. globe 5. crop II. 1. Reading aloud

3. battled

2. talking like this

3. attending the famous university 4. losing the good opportunity III. 1. Eating

5. not having finished his homework

2. arguing 3. sailing 4. doing

5. correcting 6. winning 7. reading

8. working 9. crying 10. walking

Using Language

I. 1. reduced 4. chemical

2. skimming 3. discoveries

II. 1. built up 2. focus on 3. leading to 4. keeping ... free from 5. comment on / about 6. turn to organic farming 7. avoid affecting health 8. carrying away the soil III. 1. by

2. on

3. from

4. on / about 5. from

IV. 1. chemical 2. production

3. minerals 4. discovery 5. Bacteria