听力篇章_2

19.

Both groups spend a lot of time on mobile devices.

Both groups attach importance to social connections.

They are equally competent in using new technology.

They are similar in terms of social skills.

20.

Their social skills were negatively affected.

Their school performance was slightly lower.

Their emotions were much harder to regulate.

Their relations with peers were badly strained.

21.

It may pose a threat to their children's safety.

It may affect society's traditional values.

It may hurt their relations with children.

It may change their children's ethical values.

CET4