is known to us all is that the old worker, 　　　life was hard in the past, still works hard in his seventies.

A．As; whom

B．What; whom

C．It; whose

D．What; whose

息风止痉又能平喘利尿

A．白僵蚕
B．地龙
C．天麻
D．钩藤
E．蜈蚣