Choose the word or phrase (A; B; C or D) that best completes the sentence

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1. According to the text, about ________ of teens are using social media.
A. 33% B. 25% C. 20% D. 13%

2. The lack of ________ and in-person contact with friends may lead to teens' stress and anxiety.
A. family B. social media C. contents D. sleep

3. Seeing violence on social media sites may result in teens' ________ behaviours.
A. normal B. acceptable C. anxious D. aggressive

4. Parents should establish good social media ________ for their teens.
A. sites B. habits C. image D. safety

5. The word ongoing in the last paragraph is closest in meaning with ________.
A. moving B. never-ending C. regular D. immediate