8岁女孩，体检发现心脏有杂音，活动后乏力、气促，无杵状指，胸骨左缘第2肋间可闻及Ⅲ级响亮喷射性全收缩期杂音，伴收缩期震颤。X线示肺野缺血，肺动脉总干膨出。经超声心动图和右心导管检查，证实为肺动脉瓣狭窄

其狭窄部位最可能的诊断为

A．肺动脉瓣狭窄

B．肺动脉瓣与漏斗部联合狭窄

C．肺动脉瓣下狭窄

D．以上都不是

E．肺动脉分支狭窄

With prices rising sharply, we now have to spend _______ three months ago on basic living materials.

A．as twice much as

B．twice as much as

C．twice as more than

D．twice as many as