A modern example of the process of evolution by natural selection in action is provided by the peppered moth . The moth is ....1.... pail in colour , a mottled grey which ...2... the moth to settle , wings outstretched , ....3... the bark of lichen covered trees and ..4... unnoticed . It can thus save itself from many ....5... birds . However , many years ago some British .....6.. found that there does exist a second ...7... of this moth , with dark sooty wings . Research has .....8... established that both belong to the ....9.... species , but the dark moth lives in ....10... surroundings , where the trunks of the trees on which they live are dark with industrial grime .
1. Only , normally, really , obviously
2. Permits , allows , enables , obstructs
3. In , on , about , under
4. Be , hide , Run , come
5. Ordinary , circulatory , predatory , stationary
6. Entomologist , Ornithologist , Excavators , Scholars
7. Group , section , variety , society
8. However, now , then, since
9. Same, similar, like, one
10. Rural , mechanical , agricultural , urban
