________ looking after her sick mother, the fifteen-year-old girl had to take up two part-time jobs to earn some money for food．

1. A.
   As far as
2. B.
   As long as
3. C.
   As much as
4. D.
   As well as

______ looking after her sick mother, the fifteen-year-old girl had to take up two part-time jobs to earn some money for food．

A．As far as              B．As long as           C．As much as           D．As well as