下列各项属虚证的临床表现是()

A.二便不通

B.精神亢奋

C.烦躁不宁

D.二便失禁

E.疼痛剧烈

He failed in the exam not only        his laziness but also        he didn’t listen to the teacher.

A．because; for

B．because of; because

C．as; for

D．for; since