John is the boy ________legs were badly hurt in the accident.
A:whose
B:that
C:who
生姜是一种亦食亦药的常用食品及调味品,对于疾病可治可防。请回答下列有关生姜油提取的问题:
China's high-speed trains _________ and perfected now.
“日出江花红胜火,春来江水绿如蓝”,春天使江水变绿的主要生物是____植物.