—Do you know ______ the new mobile phone last week?

—Maybe 6,000 Yuan. I’m not sure.

A．how much Mr. Li paid for

B．how much Mr. Li spent

C．how much did Mr. Li pay for

D．how much it cost

在解释人类外貌的变化中，拉马克的理论是（）。

A、用进废退

B、自然选择

C、上帝创造

D、基因突变