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Oh, yes, sir, I think you are quite right, too, on the point that I benefit a lot from other warmhearted teachers with their heartfelt instructions but not just tip of the iceberg. BTW, since I am a non-native speaker I really have no idea about your native wording I underlined above in the quote but don't even bother yourself to give me any explanation because it's neither a big deal nor necessary.
Goodbye.
Reagly is a typing error, I meant really . As for 'tip of the iceberg, this is an idiom as Mike explained. I was referring to the ''time' part of the discussion when I used that.
Re: Some questions about 'down' 
. As for 'tip of the iceberg, this is an idiom as Mike explained. I was referring to the ''time' part of the discussion when I used that.
Linear Mode
