Can I say like this? He has been to not only America and England,but also Japan. Is it a right sentence?Thank you!

Can you give me some examples? Some words usually use with adjunct words for them. I mean for example shoes,a pair of shoes I am wearing a pair of shoes. Can I say:I am wearing shoes. Is that right? now I only know few words like these. trousers,a pair of trousers glasses,a pair of glasses bread,a piece of bread Can you give me more example?thank you!

What is the difference of 'sandal','slipper' and'a flip-flop'? What is the difference of 'sandal','slipper' and'a flip-flop'?I know they are all shoes.I am very confused about their description.

what questions I can't ask to an American friend? If I ask those questions,I am not polite to them.

First notebook entry: Introducing myself Looking for friends to help my English.My English lvl is not good.You may give some homework for me.I am happy here. 希望在这里找到一些志同道合的朋友一起学习语言，本人英语水平一般，有待提高，若是能得到朋友们的指点，小弟感谢不尽！如果你也有语言上的问题，若我能帮得上忙，小弟非常乐意与你共同探讨。