--Look! Where now? --I'm sorry, but I just now. [ ] A．were you heading; thought
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![--Look! Where now? --I'm sorry, but I just now. [ ] A．were you heading; thought](/pic/43_900911.jpg)
--Look! Where ________ now?
--I'm sorry, but I ________ just now.
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A．were you heading; thought
B．do you head; am thinking
C．are you heading; was thinking
D．did you head; think
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