Some animals have unique___________that allow them to survive in extreme weather conditions.
A. characteristics B. problems C. feelings D. conditions
A. characteristics B. problems C. feelings D. conditions
A. information B. note C. message D. warning
A. up B. on C. back D. in
A. transparent B. lucid C. clear D. translucent
A. away B. down C. out D. off
A. expressive B. articulate C. eloquent D. calm