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听力原文:M: Look, the lights in the lab are still on. It must be Professor Zhang who is st
W: How could it be? I saw her go home just a moment ago.
What does the woman mean?
A.Professor Zhang couldn't be in the lab.
B.Professor Zhang forgot to turn off the lights in the lab.
C.Professor Zhang went home a long time ago.
D.Professor Zhang was the last one to leave the lab.