| 3.5 Energy sources | In:Vocabulary Builder 1 (1987) Seal, B | ||
| Elements: | Words in context | p.64 | |
| Elements: | Exercise 1 | p.64 | |
| Elements: | Exercise 2 | p.65 | |
| Elements: | Just for fun | p.65 | |
| Elements: | Think about | p.65 | |
topic | |||
reading x2 reading task reading text vocabulary x5 vocab example text vocab exercise x4 non-linguistic material drawing |