[单选题] Of the characteristics listed for the basic word stock,the most important is ________.

1、[单选题]What does the word do mean in the phrase do the flowers?

• A、work out
• B、brush
• C、arrange
• D、study

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2、[填空题]By grammatical functions，idioms can be classified into idioms nominal in nature，idioms adjectival in nature,idioms verbal in nature,idioms adverbial in nature an_____idioms.

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3、[填空题]From the synchronic point of view,polysemy is viewed as the_____of various meaningsof the same word in a certain historical period of time.

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4、[名词解释]elevation(a type of word-meaning changes)

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5、[主观题]【问答题】Guess the meaning of the underlined word in the following sentence and tell what contextual clue helps you reach the understanding.
He was in a mood of complete euphori his happiness being the result of an anmouncementthat he had won the sweepstakes.

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