He tried to avoid________my questions in class.

A．to answer

B．answering

C．to have answered

D．having answered

有局部侵袭性且肿瘤含淀粉样物质的是（）

A.成釉细胞瘤

B.牙源性钙化上皮瘤

C.牙瘤

D.牙源性钙化囊肿

E.牙源性黏液瘤