Проверьте, пожалуйста, предложения на наличие грамматических и временных ошибок.
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) I built my reputation on hard work and unusual skills.
4)  The powers of persuasion must has people who want to become a magistrate or, perhaps, a famous politician.
5) I try to improve my confidence in myself by communicating with different people and I going to acting classes (курсы актерского мастерства)
6) When I sad, my arms are crossed, I have a downturned mouth and I have my head down.
7) His facial expression changed as soon as he heard the voice of Mary.
8) I hate when people invading my personal space.
9) The final result was a minor matter for him
10) Today I made a business deal of all my life.
11) A main attraction in Saint Petersburg is Peter and Paul Fortress.
12) My mum adores to visit the exhibition of hand-crafted goods.
13) Some centuries ago, american travelers to broaden the horizons of our world.
14) Coming back to home we are sang song, laughed and swap stories about our life.
15) Look at the gladiatoria fights was for him a common sight.
16) If you know a foreign language, then you will not have language barriers
17) My cat doesn't hiss and scratch, then it's in high spirits.
18)  I hope, I'll get the chance to retake the test.

Спасибо вам огромное! Извините, что 4 звезды поставил, не туда нажал...

Удачи )

Спасибо! И вам удачи:)

1) The famous symbol of non-verbal communication is thumb (thumbs) up that means "It's cool". 2) My sister became (is going to become) a body language expert because she want (wants) to help people know when someone is lying (врет, лжет). 4) The powers of persuasion must has people who want to become a magistrate or, perhaps, a famous politician. (A man who wants to become a magistrate or, perhaps, a famous politician must have the powers of persuasion. She was using all her powers of persuasion to induce Bill to remain in London.) 5) I try to improve my confidence in myself by communicating with different people and (in addition to it) I (am) going to (take) acting classes (курсы актерского мастерства) 6) When I (am) sad, my arms are crossed, I have a downturned mouth (my mouth is downturned) and I have my head down (I have a long face) . 7) His facial expression changed as soon as he heard the voice of Mary. (Mary's voice) 8) I hate when people invading (invade) my personal space. 10) Today I made (have made) a business deal of all my life. 11) A main attraction (One of the main attractions) in Saint Petersburg is (the!) Peter and Paul Fortress. 12) My mum adores to visit the exhibition (exhibitions) of hand-crafted (handcraft) goods. 13) Some centuries ago, american travelers to broaden (broadened) the horizons of our world. 14) Coming back to home (On our way home), we are sang (were singing) song (songs), laughed (were laughing) and swap (were swapping) stories about (from) our life. 15) Look (looking) at the gladiatoria (gladiators') fights was for him a common sight (a common sight for him). 16) If you know a foreign language, then you will not have language barriers (Knowledge of foreign languages will help you to surmount the language barriers. Language barriers hindered communication between scientists. I realized I had to surmount the language barrier.) 17) My cat doesn't hiss and scratch, then it's in high spirits. (When my cat is in high spirits, it doesn't hiss and scratch.)