GDW8-39

Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.

A.      Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes

B.       Whereas the tiny tubes for the conveying of nutrients to bone cells are arrayed in mammals in parallel lines, birds have tubes that

C.      Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds’ tubes

D.      Unlike mammals, in whom the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, the tubes in birds

E.       Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes

Whereas的用法出现得比较少，这题很困惑，在汇总里没有找到．当时选了Ｃ，其实本来觉得ＷＨＥＲＥ有问题，但是做题的时候对ＷＨＥＲＥＡＳ很有怀疑，所以排除了Ａ，Ｂ．请大家指教～～～