状语从句A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.A.when B.unlessC.after D.until 不是until后若肯定句式要接持续性动词吗,为什么选D,我明白选D的句意

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状语从句A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.A.when B.unlessC.after D.until 不是until后若肯定句式要接持续性动词吗,为什么选D,我明白选D的句意
状语从句
A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.
A.when B.unless
C.after D.until
不是until后若肯定句式要接持续性动词吗,为什么选D,我明白选D的句意

状语从句A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.A.when B.unlessC.after D.until 不是until后若肯定句式要接持续性动词吗,为什么选D,我明白选D的句意
until后若肯定句式不用接持续性动词