It was not until she collected enough material       to create her new novel．

       A．did she beg4n                 B．when she began

       C．that she began                       D．that did she begin

It was not until she collected enough material ________ to create her new novel．

1. A.
   did she began
2. B.
   when she began
3. C.
   that she began
4. D.
   that did she begin

It was not until she collected enough material       to create her new novel．

      A．did she beg4n              B．when she began

      C．that she began             D．that did she begin

It was not until she collected enough material      to create her new novel．