Контрольные задания > A. People can't hear elephants' sounds because...
1) their sounds are not high enough.
2) elephants communicate silently.
3) humans can understand only very low sounds.
Вопрос:
A. People can't hear elephants' sounds because...
1) their sounds are not high enough.
2) elephants communicate silently.
3) humans can understand only very low sounds.