Question

________one scientist has pointed out, children’s skulls are not fully developed

1. A.
   That
2. B.
   As
3. C.
   Which
4. D.
   What

Answer 1

B
定语从句考查题。关系词指代整个主句时可以用which或as但是二者位置不同，as引导的从句位于句首或句中而which引导的从句只能位于句中故本题选B。句意：正如一位科学家指出的那样小孩的骨骼还没发育好。