题目内容
河北省衡水中学2011年第二学期第一次调研考试
It was not until the boat was out of sight _____________ their hands.
A. did they stop waving B. that they stopped waving
C. they don't stop waving D. had they stopped waving
B
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题目内容
河北省衡水中学2011年第二学期第一次调研考试
It was not until the boat was out of sight _____________ their hands.
A. did they stop waving B. that they stopped waving
C. they don't stop waving D. had they stopped waving
B