Just then , I understood what the saying “Giving is getting” really meant. Everyone in the world needs help , everyone can offer help and everyone will be helped by showing kindness. Giving sometimes doesn’t cost ______ , but it means a lot to the people who you help .
The man’s happiness at that moment comes into my mind every time I have the chance to help others .
阅读理解（二）（本题共6小题，每小题2分，满分12分）
阅读下列短文，完成下列问题。
Do you have a mobile phone ? Do you send text meaasges to your friends and family ?
Text messaging or “texting “(短信), is becoming very popular . But, scientists have discovered that texting can give us problems with our hands . Be careful ! Too much texting can cause swelling (肿胀) in our thumbs (拇指). Our thumbs were not made for pushing small buttons , over and over. Scientists call this problem RSI(重复性紧张劳损).We spoke to a doctor called harriet Wilson , who treats many sick people with RSI .(6) She says that we need to see how much time we are spending in typing text messages.If we are spending more that 10-15 minutes at once , we could have peoblems in the future .
(7)As mobile phones develop , they are getting small with buttons closer together . Texting with a smaller phone ,. Is it worse than using a larger phone with bigger buttons . Using a computer keyboard and playing video games can cause the same problem . So more and more people could find themselves with RSI. Among them , most are university students and teenagers , as they do not know the risks of spending so much time using computers , video games and mobile phones . If we don’t do something about this , too many young people could grow up in terrible pain .
According to the passage , what is becoming popular now ?
_________________________________________________?
Does the word “Once “ mean “one time” in the second passage ?