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. ЗАРАНЕЕ СПАСИБО ! ссррооччнноо

Answer 1

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

Answer 2

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