Highlights
The Cost of Freedom
Lori Polydoros
Science & Nature
endangered species, birds, controversy, scientists, helpers, science, conflict resolution
VLL
5
9,437
B2
English
9781792255137
Meet Igor, the last free-flying condor who lived in a zoo for 15 years. Researchers learned a lot and were given hope that condors could live in the wild again. Humans, who were once the condor's problem, became their rescuers. Could they live on their own without help from us?
Word lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Coverage |
|---|---|---|
| Eiken Grade 1 | 3,105 | 0.71% |
| Eiken Grade 2 | 866 | 6.24% |
| Eiken Grade 3 | 900 | 40.22% |
| Eiken Grade 4 | 600 | 44.5% |
| Eiken Grade 5 | 600 | 42.17% |
| Eiken Grade Pre1 | 2,868 | 2.44% |
| Eiken Grade Pre2 | 1,327 | 14.32% |
| Eiken Grade Pre2+ | 1,562 | 17.48% |
| NDL | 875 | 64.57% |
| NGSL 1 to 1,000 | 1,000 | 63.4% |
| NGSL 1,001 to 2,000 | 1,000 | 28.9% |
| NGSL 2,001 to 3,000 | 801 | 17.48% |
| NGSL Supplemental | 52 | 38.46% |
Grammar lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Unique | Coverage | Unique |
|---|---|---|---|---|
| Eiken Grade Pre1 | 94 | 94 | 0% | 0% |
| Eiken Grade 2 | 123 | 122 | 0% | 0% |
| Eiken Grade Pre2 | 111 | 108 | 0% | 0% |
| Eiken Grade 3 | 48 | 47 | 0% | 0% |
| Eiken Grade 4 | 52 | 49 | 0% | 0% |
| Eiken Grade 5 | 176 | 139 | 0% | 0% |
| A1 | 352 | 316 | 0% | 0% |
| A2 | 949 | 893 | 0% | 0% |
| B1 | 1,126 | 1,106 | 0% | 0% |
| B2 | 775 | 760 | 0% | 0% |
| C1 | 402 | 395 | 0% | 0% |
| C2 | 312 | 308 | 0% | 0% |