The journey around the world took the old sailor nine months, ________ the sailing time was 226 days.[ ]

A. of which      

B. during which    

C. from which time    

D. for which

尿素的生物合成是在下列哪个器官进行的

A．肝脏

B．肾脏

C．肺

D．肾上腺

E．小肠