Ⅱ. Complete the following statements with proper words or expressions according to the course book. (15%)
31. Content words are changing all the time whereas functional words are ______.

32. If we say that Old English was a language of full endings, Middle English was one of ______ endings.

33. Derivational affixes can be further divided into prefixes and ______.

34. “Motel” is a word formed through ______.

35. Words like “bang, pingpong, miaow” are examples of ______ motivation.

36. Contradictory terms do not show ______, as far as antonyms are concerned.

37. Increased scientific knowledge and discovery are also important factors that account for the

change of word ______.

38. Based on the ______ context, we can determine the meaning of “Sarcasm doesn’t become you” as “Sarcasm doesn’t suit you”.

39. “Sing a different tune” is an idiom ______ in nature.

40. British dictionaries gene rally use International Phonetic Alphabet to mark the ______.

Ⅲ. Define the following terms. (15%)
41. creation

42. conversion

43. homonymy

44. lexical context

45. deletion of idioms