Directions: Complete the following passage by filling in each blank with one word that best fits the context．
You are mistaken if you think all Chinese people speak in the same way. Have you ever seen a person from Shanghai try talking to someone  48  Guangzhou?  49  is quite likely that both of them may feel puzzled! The Chinese language, as a whole, uses the same set of character,  50    even the same characters can have different pronunciations. That is   51  
it is difficult for people to understand each other. Luckily, the widespread use of Putonghua in China has made a great contribution    52   people’s communication, though people from different areas tend to speak with various accents.
People in Northern Europe are    53   luckier. Even though people from Sweden , Denmark and Norway have their own official languages, it is very convenient    54   them to communicate with one another. Do you know why? That is because their languages are quite similar, though not without small distinctions.   55  , they can communicate easily in their mother tongues.