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1 Nam said to Hoa:''Don't interrupt me while i'm speaking!''
-) Nam asked hoa.......... while he was speaking
2 some residents may suffer from hearing loss because there is noise pollution here
-) if.............. pollution here,some residents might not suffer from hearing loss
3 no one will reply the customer's emails tomorrow
-) the customer's emails................. tomorrow
4 The girl's good at playing the piano well.You met her yesterday
-) The girl............ good at playing the piano