At the age of twenty Steve left his hometown, _____ to return without making his mark.

A．determining not

B．not determined

C．determined not

D．not determining

“物价上涨缓一点，孩子学费降一点，看病吃药省一点……”这一民谣反映出老百姓对价格上涨的敏感。其原因是（）.

A.物价水平影响生活水平

B.商品价格必须与价值相符

C.物价上涨就是通货膨胀

D.价值规律是商品经济的基本规律