It to me that we still have many things to do so I went back to my office at once.A. hap

问题补充：

It to me that we still have many things to do, so I went back to my office at once.

A. happened

B. struck

C. occurred

D. broke out

答案：

A. happened

B. struck

(答案→)C. occurred

D. broke out

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