１日１題リスニング：yawn

Created By ondoku3.com

Q1

1. Humans yawn less frequently than chimps.
2. Human yawning may influence chimps.
3. Chimps are able to “catch” each other’s yawns.
4. Chimps only yawn in groups.

Q2

1. They observed the animals’ sleeping habits.
2. They recorded the animals’ communication techniques.
3. They watched the animals’ reactions to videos.
4. They examined the animals’ eating habits.