A. they are indispensable in everyday communications
B. they make them look more stylish
C. they keep the users alert all the time
D. they cannot be replaced by regular phones
B
Đáp án B
Giải thích: “They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.” Cool đồng nghĩa với fashionable hoặc stylish.
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