THE REASON I LEFT IS ... I WAS BORED.A. WHY B. WHILE C. FOR D. THAT

1. - DE VA DAP AN HSG ANH 6 THI THU
Tiếng Anh DE VA DAP AN HSG ANH 6 THI THU

1. The reason I left is ... I was bored.

A. why B. while C. for D. that