向盛有一定淀粉溶液的试管中加入适量的唾液淀粉酶，37℃水浴保温后，加入适量的0.1g/mL的NaOH和0.05g/mL的CuSO₄溶液，摇匀后，观察试管内溶液变化应该是[ ]

A．产生砖红色沉淀

B．溶液呈现蓝色

C．溶液呈现紫色

D．溶液不变化

If someone says "You played very well in the game today. " one may respond with "______"

A. Yes, I do think so.



B. I was lucky you like it.
C. Thank you. So did you.


D. Do you really think so