In a far-off country there was once a little girl who was called Silver-hair, because her curly hair shone brightly. She was a sad romp, and so restless that she could not be kept quiet at home, but must needs run out and away, without leave.The door was ajar, and Silver-hair pushed it open and found the place to be quite empty, so she made up her mind to go in boldly, and look all about the place, little thinking what sort of people She went into the parlour, where there were three chairs. She tried the biggest chair, which belonged to the Big Bear, and found it too high;lived there.Now Silver-hair was by this time very tired, and she went upstairs to the chamber, and there she found thrthen she tried the middle-sized bed, which belonged to the Middle-sized Bear, and she found it too hard;ee beds. She tried the largest bed, which belonged to the Big Bear, and found it too soft;While Silver-hair was lying fast asleep, the three bears came home from their walk. They came into the kitchen, to get their porridge, but when the Big Bear went to his, he growled out:
1. It is necessary to send a letter when in case of emergency we can contact our parents to let them know that we are OK or to ask for help. Besides, if we need some information or advice, we can always get in touch with our friends or parents. 2.I think it will disappear. Because mobile phones are much smaller, more comfortable and have more opportunities. 3. We can use email, ICQ, Facebook, Skype or other social networks for instant messaging. 4.I call them on the phone or in Skype, writing emails or less simple letters. 5.I prefer social networks, because there you can instantly send messages, music, photos and important documents.
ответ:have to
Объяснение:
модальный глагол "должен", must не подходит, потому что он употребляется когда запрещают правилами. а тут больше рекомендация