－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

五味子和白芍在小青龙汤中是（）

A.君药

B.臣药

C.佐助药

D.佐制药

E.反佐药