prep 90

90.
The parachutelike membranes of Africa’s
scaly-tailed flying squirrels differ from those of the flying squirrels in the
family Sciuridae because they are attached to a cartilage rod at the elbow
instead of the wrist.

A.
because they are attached to a cartilage rod at the elbow instead of

B.
because of being attached to a cartilage rod at the elbow rather than at

C.
in their attachment to a cartilage rod at the elbow instead of being attached
at

D.
in that they are attached to a cartilage rod at the elbow rather than at

E.
in their being attached to a cartilage rod at the elbow instead of

A: instead of 应该补充完整at the wrist，否则会有歧义

B: because of + doing 不如从句表达清晰

C: 表原因用从句比介词强；instead of 前后不对称

D: correct

E: their being 错

注意：

1、because 和in
that属于用词精确性的错误，属于比较轻的错误

2、instead of 和rather
than也属于用词精确性的错误，属于比较轻的错误

3、比较结构避免歧义的一个方式是补充介词或助动词