Dina,____for months to find a job as a waitress,finally took a position as a localadvertising agency.A.struggling.B.having struggling为什么选B?求详解,

问题描述:

Dina,____for months to find a job as a waitress,finally took a position as a local
advertising agency.
A.struggling.B.having struggling
为什么选B?求详解,