The fantastic mud-rock flow in Zhouqu of Gansu at about 22 o’clock on August 7th, 2010 was considered deaths of more than 1,000 natives .
A. to cause
B. causing
C. to be causing
D. to have caused
网友回答
A. to cause
B. causing
C. to be causing
(答案→)D. to have caused
解析：考查非谓语动词。be considered to have done认为过去做过某事，根据句意选D。