【2020最新整理国开(电大)人文英语1-3896网上形考机考题库】The girl _____________ the case to the staff when her parents arrived.

【2020最新整理国开(电大)人文英语1-3896网上形考机考题库】The girl _____________ the case to the staff when her parents arrived.
选择一项：
A. was reporting
B. reported
C. were reporting