Researchers have found that individuals whohave
beenblindfrom birth, and who thus have never seen
anyone gesture, nevertheless make hand motions
when speaking just as frequently and in virtually the
same way as sighted people do, and that they will
gesture even when conversing with another blind
person.
(A) who thus have never seen anyone gesture,
nevertheless make hand motions when speaking
just as frequently and in virtually the same way
as sighted people do, and that they will gesture
(B) who thus never saw anyone gesturing,
nevertheless make hand motions when speaking
just as frequent and in virtually the same way as
sighted people did, and that they will gesture
(C) who thus have never seen anyone gesture,
nevertheless made hand motions when speaking
just as frequently and in virtually the same way
as sighted people do, as well as gesturing
(D) thus never having seen anyone gesture,
nevertheless made hand motions when speaking
just as frequent and in virtually the same way as
sighted people did, as well as gesturing
(E) thus never having seen anyone gesture,
nevertheless to make hand motions when
speaking just as frequently and in virtually the
same way as sighted people do, and to gesture
答案是A，OG的解释其他的都能理解，除了这里：individuals whohave
beenblindfrom birth, and who thus have never seen
anyone gesture，额这里用两个定语从句意思不是两类人了吗？这里应该是说的是同一类人才对啊。