The girl had hardly rung the bell       the door was opened suddenly, and her friend rushed out to greet her.

A. before B. until   C. as      D. since

The girl had hardly rung the bell       the door was opened suddenly, and her friend rushed out to greet her.

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The girl had hardly rung the bell       the door was opened suddenly, and her friend rushed out to greet her.

  A. before               B. until           C. as                   D. since

 The girl had hardly rung the bell            the door was opened suddenly, and her friend rushed out to greet her.

A. before         B. until          C. as                 D. since

The girl had hardly rung the bell ________ the door was opened suddenly, and her friend rushed out to greet her．

1. A.
   before
2. B.
   until
3. C.
   as
4. D.
   since

The girl had hardly rung the bell           the door was opened suddenly, and her friend rushed out to greet her.

  A. before           B. until           C. as            D. since