Scarcely raining the PLA fighters started on their way again.
A. it had stopped...before
B. it had stopped...then
C. had it stopped...than
D. had it stopped...when
网友回答
A. it had stopped...before
B. it had stopped...then
C. had it stopped...than
(答案→)D. had it stopped...when
解析：考查固定句型。scarcely...when...“一......就......”。Scarcely后面的句子用部分倒装，排除A、B；no sooner... than...也是“一......就......”，排除C。故选D。