【单选题】【消耗次数：1】
I received his mother’ s telephone call at eleven. _____ that
he was badly hurt in an accident yesterday.
①
Then did I know
②
Only then I knew
③
Only then did I know
④
Only then knew I
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相关题目
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I thought I knew the way, but ____I got lost.
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下面关于线程的叙述中，正确的是？
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②
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在下面的叙述中，正确的是？
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②
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