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29．―I’m going to the supermarket．―Will you get me some chocolate you are there.mum?A．since B．because C．if D．while 【查看更多】

 

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--I'm going to the supermarket.

--Will you get me some chocolate ________ you are there, mum?

[　　]

A．since
B．because
C．if
D．while

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