Look out! Don't get too close to the house _____ roof is under repair. [ ]

A. whose

B. which

C. of which

D. what

研制出高产的杂交水稻，被誉为“世界杂交水稻之父”，为世界粮食增产发挥了重要作

用的科学家是

A．达尔文

B．袁隆平

C．牛顿

D．爱迪生