Bill was the telephone.
A. considered inventing
B. considered to have discovered
C. considering having invented
D. considered to have invented
网友回答
A. considered inventing
B. considered to have discovered
C. considering having invented
(答案→)D. considered to have invented
解析：本题考查consider的用法，be considered to have done意为“被认为已经干了……”合乎题意。
(1)consider作“考虑”讲时可用consider+n./pron. doing结构。
(2)consider作“认为”讲时不可用consider doing 结构。
(3)consider sb./sth.(to be)+n./adj.认为某人/物怎样，该复合结构中to be 可省略。
(4)be considered to have done认为某人已经干了某事。