II. Complete the following statements or passages with proper expressions according to the text （每小题1分，共8分）
1. The definition of a word comprises the following points： _____； ______； _____； ________.
2. There is no _____ relationship between the sound which stands for a thing or an idea and the actual thing and idea itself.
3. The expansion of vocabulary in modern English depends chiefly on ______. The most productive are _____， ______ and _______.
4. Affixation is generally defined as the formation of words by adding ______ or ______ to stems. According to the positions which affixes occupy in words， affixation falls into two subclasses： ______ and _____.
5. When a word is first coined， it is always ______. But in the course of development， the same symbol must be used to express more meanings， the result is _____.
6. The problem of interrelation of the various meanings of the same word can be dealt with from two different angles： ________ and _______.
7. The development of word - meaning from monosemy to polysemy follows two courses， traditionally known as ______ and ________.
8. Perfect homonyms are words identical both in _____ and ________， but different in _______.
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