cac anh chi oi
tim loi sai:1. air pollution, together with littering, are causing many problems in our large, industrial cities today
2. These televisions are quite popular in Europe , but those ones are not
bai nay ko thieua theo mình thì lỗi sai ở chữ " ones" đơn giản là vì one không thêm s :
2. These televisions are quite popular in Europe , but those ones are not
>>>Sửa lại: 2. These televisions are quite popular in Europe , but those one are not!
Hi vọng mình sửa đúng! {:7_254:}
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