听起来，他不怎么高兴。
Last evening he didn t review the text.
昨天晚上他没复习课文。
He didn"t appear until the party was over."
他直到聚会结束才来。
If he didn ' t mean it , why ' d he say it ?
如果他不是那个意思他干嘛那么说?。
Being absent from class, he didn' t learn how to work out the problems.
由于上课缺席，他没能学会怎样解这些习题。
What he didn"t say is that open data is also easier to advertise against."
而他没提到的则是，开放性的数据可以在广告市场更有竞争力。
I didn"t work until he came back."
他回来我这才开始工作。
We didn"t discuss the problem until he came back."
我们一直等到他回来后才讨论问题。
We didn"t discuss the problem until he came back."
我们一直等到他回来后才讨论问题。
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