— Peter, where did you guys go for the summer vacation? — We______busy with our work for months, so we went to the beach to rela

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问题 — 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.

选项 A、were
B、have been
C、had been
D、will be

答案C

解析 选项动作发生在went to the beach之前,选had been。
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