I haven’t seen Li Lei these days. He was said _____ to the hospital to receive treatment.

A．to take

B．to have taken

C．to be taken

D．to have been taken

上皮非典型性增生是指（）。

A.上皮细胞增生，但极性不丧失

B.不转移

C.不浸润上皮下层

D.上皮细胞异型增生，排列紊乱，极向消失

E.不会进一步发展为原位癌或浸润癌