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He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out.
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I don't know where she is, she may be in Wuhan.
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At this moment, our teacher must be correcting our exam papers.
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We would have finished this work by the end of next December.
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The road is wet. It must have rained last night.
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Mike can't have found his car, for he came to work by bus this morning.
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