语法填空（共10小题，满分15分）
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中的词的正确形式填空。
Although English is not as old as Chinese, it is spoken by many people around the world every day. English speakers are always making new words and we should be able to know ______46_____ most words come from.
Did you ever think about why hamburgers are called hamburgers, ____47___ (especial) when they are not made ___48___ ham? About a hundred years ago, some men went to America from Europe. They came from a big city in Germany ___49___ (call) Hamburg.
They did not speak good English, __50__ they ate good food. Some Americans saw them eating round pieces of beef. Never ___51____ they seen such a strange way. They couldn’t help ___52____ (ask) the Germans what it was. The Germans did not understand the question and answered, “We came from Hamburg.” One of these Americans owned a restaurant, and had an idea ___53____ he could do something new. He cooked some round pieces of beef like ____54___ the men from Hamburg ate and sold them in quite a few countries around the world.
Whether this story is true or not, it may be considered to be an interesting ___55___.