托福考试会涉及到大量的词汇，考生必须有一定的词汇积累才能在托福考试中游刃有余。不过，在大量的词汇中，有一些基础类词汇更应该注意，像这类词汇，大家不但要了解它们的拼写方式，更要清楚它们的运用方法和搭配关系。

Group 1 food crops

1.abandon

2.adversely

3.aggregate

4.cultivation

5.fertilize

6.intensify

7.irrigation

8.obtain

9.photosynthesis

10.precipitation

Group 2 disaster

1.anticipate

2.catastrophic

3.collide

4.eruption

5.famine

6.flood

7.impact

8.persevere

9.plunge

10.unleash

Group 3 evolution and migration

1.adapt

2.diverse

3.evolve

4.feature

5.generation

6.inherent

7.migration

8.physical

9.process

10.survive

Group 4 petroleum alternative

1.constraint

2.contamination

3.deplete

4.dispose of

5.elementally

6.emission

7.extinction

8.reservoir

9.shrink

10.stable