提出人类和类人猿有共同祖先的科学家是（　　）

A．施莱登

B．达尔文

C．施旺

D．达芬奇

The woman, who is said to have moved to America, _____ in China for almost twenty years.[ ]

A. lived              

B. has lived      

C. was living    

D. had lived