Ⅳ.Complete the following statements with proper expressions according to the textbook. (10%, 2 points for each)
36. Middle English lasted for more than three hundred years ：_____.
37. The four major foreign contributors to English vocabulary in earlier times are Latin, French, Scandinavian and _____.
38. The relationship between sound and _____ is arbitrary and conventional.
39. Concept is the _____ of human cognition, and it reflects the objective world in the human mind.
40. A word whose meaning was borrowed from another language is called semantic _____.
Ⅴ.Study the following words and decide how each word is formed. (10%, 2 points for each)
Example: disobey (Affixation)
41. G-man （ ）
42. flu （ ）
43. sci-fi （ ）
44. pocket (v) （ ）
45.daydreaming （ ）
Ⅵ. Answer the following questions. (20%, 5 points for each)
46. What is sense?
47. How do you understand the statement that “true synonymy is non-existent”?
48. What are the types of changes in word meaning?
49. What are the similarity and the difference between a verb phrase and a phrasal verb?
Ⅶ. Analyze and comment on the given sentence(s). Pick out the idiom in the sentence, and point out its structure, grammatical function and figure of speech. (15%)
50. She said that his hair was pepper and salt.
