With a lot of mathematical problems ________, Jack was free to go to the cinema for a change in scenery. ( 章节：4 难度：3)
- A、to be solved
- B、solved
- C、solving
- D、to solve
正确答案:B
答案解析:有
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With a lot of mathematical problems ________, Jack was free to go to the cinema for a change in scenery. ( 章节：4 难度：3)
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