Not until then___that he was mistaken,when actually gave me much trouble.A.did l realizeB.had l realized
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Notuntilthen___thathewasmistaken,whenactuallygavememuchtrouble.A.didlrealizeB.hadlrealizedNotuntilth
Not until then___that he was mistaken,when actually gave me much trouble.A.did l realizeB.had l realized
Not until then___that he was mistaken,when actually gave me much trouble.
A.did l realize
B.had l realized
Not until then___that he was mistaken,when actually gave me much trouble.A.did l realizeB.had l realized
选A,因为then在那时候,是一般过去式的时间状语