根据内容和括号内所给汉语意思，写出空白处各单词的正确形式（每空一词）。
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. Experts_____ (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.