[单选题] Which of the following is NOT considered to be a stem?

1、[单选题]Which of the following is an idiom?

• A、Till the cows come home.
• B、Till the sheep come home.
• C、Till the horses come home.
• D、Till the pigeons come home.

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2、[单选题]Chop and change is an idiom ______in nature.

• A、verbal
• B、nominal
• C、adjectival
• D、adverbial

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3、[填空题]A(n)_____can be defined as a form to which affixes of any kind can be added,as is seen
in agree,disagree,and disagreement.

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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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