It ______ we had stayed together for a couple of weeks ______ I found we had a lot in common.
【正确答案】 D
【答案解析】这是一个强调句,正常语序为:I didn't find we had a lot in common until we hadstayed together for a couple of weeks.题中强调部分是not...until...部分,该句式的强调句有固定句型,即It is/was not until...that...,其中that后面的句子不用否定形式,答案为D。注意that不能换成when。