________one scientist has pointed out, children’s skulls are not fully developed.
A．ThatB．AsC．WhichD．What
B
定語(yǔ)從句考查題。關(guān)系詞指代整個(gè)主句時(shí)可以用which或as但是二者位置不同，as引導(dǎo)的從句位于句首或句中而which引導(dǎo)的從句只能位于句中故本題選B。句意：正如一位科學(xué)家指出的那樣小孩的骨骼還沒(méi)發(fā)育好。
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