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試題詳情
To their joy，they have solved the difficult problem all by themselves．
To their joy，the difficult problemhas been solvedhas been solvedall by them．
【考點(diǎn)】固定搭配/句型．
【答案】has been solved
【解答】
【點(diǎn)評】
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發(fā)布：2025/1/1 10:30:1組卷：2引用：2難度：0.4
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