青年工人，体重60kg，烧伤后半小时急诊入院，烧伤面积Ⅰ度10%，浅Ⅱ度20%，深Ⅱ度30%，Ⅲ度20%。

首先要预防和治疗的是（）

A.急性呼吸衰竭

B.急性肾功能衰竭

C.curling溃疡

D.低血容量性休克

E.全身感染

—Can you guess ______ the new schoolbag yesterday?

—Sorry, I’ve no idea.

A．how much did he pay for

B．how much he spent

C．how much he paid for

D．how much did he spend