The nurse is ________ busy ________ she has no time to look after her family．

1. A.
   so; that
2. B.
   so; as
3. C.
   such; that
4. D.
   such; as

-- The traffic is busy in Harbin.
--It’s really so. When the subway      , the traffic will become better.
A finishes         B will finish        C is finished

— I can’t get through to the general manager’s office.
—The line is busy. Someone ________ the telephone.