Проверьте, пожалуйста, есть ли ошибки в построении предложений или в грамматике. Выделенные слова - это те, с которыми нужно было составить предложения.1)

book/now. your parents/to clean/the room/now?

Выделенные жирным слова - словосочетания, с которыми нужно было составить предложения.
1) The famous symbol of non-verbal communication is thumb up that means "It's cool".
2) My sister became a body language expert because she want to help people know when someone is lying (врет, лжет).
3)

is language of rock and pop music. He is language of political. Most vocabulary in the modern computer science is in English. Doctors and scientists try to answer the same questions all over the world and for this they have to know English. Every pilot and ship's captain must speak English to communicate with each other. About 20% of the world's population speak English. That's why people study English.

Sorry for not having answered. I was too much busy with school. It is so cool that you can play the guitar. Unfortunately i do not know how to play the guitar and i'm not in the composition of any rock group. But we have music lessons where we sing songs. I like to sing songs. I adore the songs from the television show "Glee". In this series, the actors perform well-known songs around the world. Did you hear about this show? I think if you like different music, then you should watch it. I adore to rock. Classical music i do not like. Who is your favourite singer in rock? I will waint for you next letter.You friend,Roman



посмотрите,пожалуйста,есть ли ошибки.