複選題
29. Mary and Nicole had ________ got to school ________ they began to study. (複選) 
(A) as soon … as
(B)hardly … when
(C) no sooner … than
(D) scarcely … before

當使用[一 … 就 … ]的句型時，要知道它有數個句型使用，如下：

      a) The moment + S1 + V1 … , S2 + V2 …

      b) As soon as + S1 + V1 … , S2 + V2 …(選項A)

      c) S1 + had + no sooner + p.p. … than + S2 + Verb-ed …(選項C)

      d) S1 + had + hardly + p.p. … when/before + S2 + Verb-ed …(選項B)

      e) S1 + had + scarcely + p.p. … when/before + S2 + Verb-ed …(選項D)

      f) Upon/On + Verb-ing, S + V …

      其中(c, d, e)可以倒裝，如下：

      c) no sooner + had + S1 + p.p. … than + S2 + Verb-ed …

      d) Hardly + had + S1 + p.p. … when/before + S2 + Verb-ed …

      e) Scarcely + had + S1 + p.p. … when/before + S2 + Verb-ed …

資料來源： https://twenglishstudy1.pixnet.net/blog/post/313260476