Communicating with foreign teachers is really useful. your intonation will improve. Moreover, you can't remember many words 10 times or 8 times. Chatting with foreign teachers, he said once or twice and you will be extremely impressed. Moreover, after you talk with foreign teachers, you will feel more relaxed. Next time you meet foreigners, you can greet them very well. You don't have to be afraid of saying wrong. In fact, it is better to chat with foreigners more. In this way, you will know that even if you say wrong, they can understand you.