－Have you finished _______ your composition? It is time to hand it in.

－Not yet, I _______ it the whole morning, but it is so hard that I only finished half of it.

A．writing; had written

B．write; wrote

C．written; was written

D．writing; have been writing

糖尿病母亲的新生儿易发生低糖血症多是（）

A.先天性垂体功能不全

B.胰高血糖素缺乏

C.胰岛细胞增生

D.皮质醇缺乏

E.先天性氨基酸缺陷