问题补充:
It my mother half an hour to the shopping mall.
A. spends; walking
B. takes; to walk
C. spends; to walk
D. takes; walking
答案:
A. spends; walking
(答案→)B. takes; to walk
C. spends; to walk
D. takes; walking
解析:句意:我妈妈去购物中心需要半个小时。It takes sb some time to do sth.某人花一段时间做某事,固定句型,故选B.