根据句意及首字母或汉语提示完成单词。
Though we’ve learned English for some time, we still find it difficult to communicate with the n      speakers.
He speaks putonghua with a strong northern       （口音）．
They switched the conversation to a less        (尴尬的)subject，
The Chinese nation has a fine t      of respecting elderly people.
In Italy, the newly-weds are expected to give their guests presents as a        （纪念品）to remember the big day when they get married.