答案：C
— Excuse me. Could you tell me how to get to the Science Museum?
— ___________ straight on and you'll see a supermarket. It's next to the supermarket.[ ]
A. Go
B. Going
C. If you go
D. When going
某商品的需求价格弹性系数为0.9，则说明该商品的需求量对价格变化非常敏感。( )
