Wolves live in family groups if they ________ (be) in the wild.

问题描述:

Wolves live in family groups if they ________ (be) in the wild.

are
Wolves live in family groups if they are in the wild.
狼在自然环境下过群居生活
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are

are
Wolves live in family groups if they are in the wild.
狼在自然环境下过群居生活