When you call someone, it is polite to identify yourself. For example, if your name is John Smith and you were calling Robert Chen, you would say "Hello, this is John Smith. May I speak to Robert Chen, please?". When you answer the phone, it is ok to answer just "Hello". After your caller introduces himself, you would say one of the following:
"Hi John, this is Robert. How are you?"
"Speaking." or "Robert Chen speaking."
"I'm sorry, but Robert is not able to come to the phone right now. May I take a message?
"It is not polite to call someone before 9 am or after 10 pm, unless it is an emergency. ​

Hi, friend! how are you?
don’t worry about your host family! i think they will be kind to you. i know that 5 siblings at first seems strange to you. however, i’m sure that they will love you very much. i will tell you about my experience. i’ve been to another country and i was in a host family. they are from the philippines. they were really nice to me. they had 2 children. i was playing with them everyday. i felt like they became my second family. i didn’t have any problem with my host family! they always helped me if i have any questions or problems. that’s why you shouldn’t be afraid of that. your host family will treat you as a member of their family. this is a purpose of a host family in another country.

Каждое утро я встаю в семь часов утра. затем иду умываться и чистить зубы. в пятнадцать минут восьмого я уже завтракаю. на завтрак у меня бутерброды. в восемь часов утра начинаются и заканчиваются в два часа дня. затем я еду домой. в три часа дня я . на обед я кушаю супы. затем с четырёх до шести часов вечера у меня свободное время, я отдыхаю. с шести до девяти тридцати вечера я делаю уроки. в половину десятого вечера я иду чистить зубы. в десять часов вечера я ложусь спать.every morning i get up at seven in the morning. then i go to wash and brush your teeth. at fifteen minutes past seven i have breakfast. for breakfast i had the sandwiches. at eight o'clock in the morning úprka begin and end at two o'clock. then i'm going home. at three o'clock i dine. for lunch i eat soups. then, from four to six in the evening i have free time, i rest. from six to nine thirty in the evening i do my homework. at half past nine in the evening i go to brush your teeth. at ten o'clock in the evening i go to bed.