Many people use their mobile phones as the alarm clocks (鬧鐘) and often check e-mails before going to sleep.

Many years ago, my brother stayed up playing with his mobile phone and got badly ill because of that. Now he always leaves his phone in another room when going to sleep. And he encourages his friends to do so. “I sent each of my friends the same Christmas gift-an alarm clock. So they could stop using the phones as the alarm clocks,” he said.

If your mobile phone wakes you up in the morning, it may also keep you up at night. A study shows that people in mobile phone radiation (輻射) mostly have sleeping problems. And according to a Swedish study, a quarter of young people in this country feel like having their phones near them. Most of them feel sorry for not replying to messages, so they even have to reply to their friends before sleeping.

A recent study has shown that three quarters of people aged between 18 and 34 prefer to sleep with their phones near them. That number falls off a little in the middle age, but only people aged 65 and older like leaving the phones in another room while sleeping.

1.The underlined word “that” here refers to________.

A.leaving the mobile phone in the bedroom.

B.staying up playing with the mobile phone.

C.using mobile phones as alarm clocks.

D.sending e-mails at night.

2.According to the recent study, ________ of people age between 18 and 34 prefer to sleep with their phones near them.

A.15% B.25% C.75% D.85%

3.Which of the following is TRUE according to this passage?

A.The writer’s brother likes leaving his mobile phone in his bedroom now.

B.The writer’s brother sent alarm clocks to his friends as gifts.

C.Only a few people use mobile phones as alarm clocks to wake them up.

D.People aged 55 like leaving the phones in another room while sleeping.

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