A teacher has a wide (vary)______ of duties.variety空格前为形容词，空格处应该填名词。a variety of

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问题 A teacher has a wide (vary)______ of duties.

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答案 variety

解析空格前为形容词，空格处应该填名词。a variety of是个固定表达，表示“许多，各种各样的”。

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