Peter,where did you guys go for the summer vacation

Peter,where did you guys go for the summer vacation

题目
Peter,where did you guys go for the summer vacation
Peter,where did you guys go for the summer vacation?—We____ busy with our work for months,so we went to the beach to relax ourselves.A.were B.have been C.had been D.will be 为什么不选A
答案
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