题目内容（请给出正确答案）

[主观题]

The professor worked for 7 hours at a ________.A. stretchB. extendC. expandD. prolong

The professor worked for 7 hours at a ________.

A. stretch

B. extend

C. expand

D. prolong

提问人：网友zhangwei2018 发布时间：2022-01-06

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第7题

What does the professor imply about the idea that artist genius worked in solitude？

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