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“How long have you worked on the farm?” “_________ the end of last year.”

A. In       B. By      C. At      D. Since

“How long have you worked on the farm?” “____ the end of last year.”

A. In　　　　　　　　　　　 B. By

C. At　　　　　　　　　　　 D. Since

 “How long have you worked on the farm?” “____ the end of last year.”

A. In       B. By

C. At      D. Since

“How long have you worked on the farm?” “____ the end of last year.”