植物界中最高等、数量最多的一类植物是[ ]
A．藻类植物
B．被子植物
C．裸子植物
D．苔藓植物
答案：B
Peter received a letter just now his grandma would come to see him.[ ]
A. saying
B. Said
C. to say
D. says
肝硬化
