单项选择题 The Romans leaded by ______ came with 10,000 soldiers and landed on the shore of Kent in 55B. C.

单项选择题 Among the great Middle English poets, Geoffrey Chaucer is known for his production of ______.

单项选择题 It is taken as a great contribution made by ______ that languages in the world are classified into different language families according to their genetic relations.