萝卜储存久了会变空心，这是因为萝卜通过（　　）分解了有机物．

A．光合作用

B．吸收作用

C．呼吸作用

D．蒸腾作用

(2012·上海高考)The new law states that people ________ drive after drinking alcohol.

A．wouldn't

B．needn't

C．won't

D．mustn't