What happened to John this morning?
John, why didn't you answer my phone call this morning?<br />I called you about a meeting you should have gone to.<br />Really, Julie? Sorry, my phone ran out of power.<br />Oh, I see. It's fine. I asked William to go instead.
A . He was late for a meeting.
B . His phone battery died.
C . He missed a call from William.
答案:B