摘要： Only then realize I had said the words their feeling of disappointment A. did I; added to B. I; adding to C. I did; added D. did I; adding to
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Only then how much damage had been caused.?
A.she realized B.she had realized? C.had she realized D.did she realize
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________ the people have become masters of their own country that science can really serve the people.
A.Only then B.It is only then
C.Only when D.It is only when
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You can leave the room only then．
→Only then ________ ________ ________ the room．