The teacher asked me _____. [ ]

A. that I had finished my homework

B. that had I finished my homework

C. whether had I finished my homework

D. if I had finished my homework

前肠尾端的内胚层向外生长形成（）。

A.卵黄蒂

B.肝憩室

C.喉气管憩室

D.背胰芽

E.腹胰芽