What did Mr Wang say just now?sorry,l don't know .l_____ a call at that time.A.am answering B.answer Cwas answering D.answered根据句意选择

问题描述:

What did Mr Wang say just now?sorry,l don't know .l_____ a call at that time.
A.am answering B.answer Cwas answering D.answered
根据句意选择