摘要： It was not until the train was out of sight they stopped waving their hands. A. when B.before C.since D.that
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It was not until the train was out of sight ________ they stopped waving their hands．
- A.when
- B.before
- C.since
- D.that
It was not until the train was out of sight________they stopped waving their hands.
A. when B.before C.since D.that
查看习题详情和答案>>It was not until the train was out of sight they stopped waving their hands.
A. when B.before C.since D.that
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