It was not until she had finished all her work_____.
A、didshereturnB
“itisnotuntilthat⋯⋯”是强调句型，“that”引导的从句用正常语序，而以“notuntil⋯⋯”开头的句子中谓语要用倒装形式。
_____you understand this rule ，you‘ll have no difficulty in dealing with such problems.
William has cut his smoking_____to five cigarettes a day.
Bothofmybrothersarenowmarried，soIhavetwo_____.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
