According to the passage, cellphones are especially popular with young people because ________

* Hướng dẫn giải

Đáp án là B

Ý trong bài: They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

Từ “cool” đồng nghĩa với fashionable hoặc stylish

people who use mobile phones.

Từ brain cells = the smallest units of the brain: tế bào não