.The letter from his girlfriend he had been looking forward to _________yesterday.

A．came

B．comes

C．coming

D．come

以下关于维生素D说法错误的是（）。

A.孕期不易发生维生素D过量中毒

B.孕期维生素D缺乏可影响胎儿骨骼的发育

C.孕期维生素D缺乏可导致新生儿低钙血症

D.孕期维生素D缺乏可导致婴儿牙釉质发育不良

E.孕期维生素D缺乏可导致母亲骨质软化症