Вставить нулевой артикль 1. ... bat is a night animal. During the day ... bats usually...

Question

Вставить нулевой артикль 1. ... bat is a night animal. During the day ... bats usually roost in large groups in ... caves ... attics or ... trees hanging upside-down.
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Answer 1

1. Bats are night animals. During the day bats usually roost in large groups in caves  attics or trees hanging upside-down.