Mobile phones help us      (容易)find people anywhere at anytime. However, using mobile phones too often may cause cancer(癌). It’s reported that people who used a mobile phone for 10 years or more were more likely to get    (大脑)cancer. Expects     (建议) you follow these tips which can reduce the risk of cancer:
◆When using your mobile phone, try to keep it away from your body as much as     (可能). Don’t put it under your pillow or (在旁边) the bed when you go to sleep.
◆When you’re on the mobile phone, use the speaker. In this way, you have just l% of the contact with radiation (辐射) you have when you hold it to your ear. An earphone is also a good idea. Try to keep your (谈话)short. If you need to talk longer, use an ordinary phone (代替).
◆Change ears when you’ re using your mobile phone. Before putting it to your ear, wait (直到) the person you are calling picks up the phone.
◆Your phone gives out radiation when you talk or text (发短信), but not when you’re listening or getting messages. Listening more and talking less can lower the risk of cancer.
◆Do not use your mobile phone when the signal is (弱) or when moving at a high (速度), for example in a car or train.