C．Beekeeping in Africa D．Honey­Lover's Helper C

Many New Zealand children are being studied for sleep disorders(紊乱) after overloading on technology before bedtime. Specialists say computers and televisions disturb sleep patterns and cause learning, concentration and growth problems.

Dr Alex Bartle, director of the Sleep Well Clinic, said that different sorts of technology were keeping children awake. Computer games and social networking sites such as Bebo and Facebook were worse than TV for exciting young minds because they were more interactive(互动的). They should be switched off at least an hour before bedtime. "To fall asleep, you need to have a certain amount of calmness in the brain," said Bartle. "being excited doesn't help those brainwaves settle."

Professor Philippe Gander, director of Massey University's Sleep / Wake Research Centre, said poor sleep had been linked to learning, behavioral and growth problems.

Bartle said parents should make sure that children were well-rested and not kept awake by the technology surrounding them. "They need to encourage kids to get out during the day. Watching TV or playing on computers as soon as they get home isn't good from a sleep point of view. Parents need to be strong enough to remove TVs or computers."

In Britain, National Health Service data show almost 3,000 under-11s were referred to specialists for problems such as sleeplessness and sleep-walking(梦游) in 2007, up 26 percent from 2002.

While there are no figures in New Zealand, experts have no doubt that the number of children in need of help is on the increase. "We have the same sorts of technology, the same lifestyles," said Bartle.

The Child Health Research Foundation in New Zealand has funded(资助) studies on sleep problems and is waiting for the results.

9. What does "technology" mainly refer to according to the passage?

A. pianos and guitars B. televisions and computers

C. learning machines D.MP3s and MP4s

10. According to Dr Alex Bartle's opinion, we can learn that ______.

A. Children should not watch TV or play online games in the evening

B. Watching TV does more harm to children than playing computer games

C. Some parents fail to set a limit on the time their children spend on technology

D. About 3,000 New Zealand under-11s have sleep problems in 2007