Oratory level questionnaire

 I'm glad to present you our FEATURES OF RUSSIAN ACCENT cluster. It shows some very common mistakes which are made by English learners every day.
As for vowel pronunciation, we present that many people don't pay attention on TRAP and DRESS sounds and speak it equally. Also we often don't do difference between long and short vowels. 

What for consonants there are plenty of  mistakes in pronunciation of  interdental  and approximant consonant and others. 

On cluster we tried to show that there are some different English tones and the most common ones are LOW RISE and HIGH FALL.

Remembering my school-based practice I can say that all the students and even some teacher make these mistakes that not so good... A consonant mistake which hurts my ears was interdental sounds and a vowel one is trap and dress.