As far as I know,Charles Babbage is generally considered___the first computer.A.to invent B.to have inventedC.having invented D.inventing

b

B.to have invented

B 不定式,并且是过去的事,用完成时

C

As far as I know,Charles Babbage is generally considered___the first computer.
A.to invent B.to have invented
C.having invented D.inventing
应该选B.
consider作为“考虑,细想”讲时,后面要用动名词,即：consider doing sth
consider作为“认为,视（某人/某物）为”时,通常用下面结构consider sb/sth as ……,但如果consider后要跟动词时,要用动词不定式,所以答案应在A和B中选.本句叙述的是过去的事情,而且用完成时态本身表示语气强调,

B
be considered to have done sth.
表示“被认为做....”,用完成时