There are some seemingly insignificant matters that, when _______ in time, can become bigger ones later on.

A．not dealt with

B．not being dealt with

C．not to be dealt with

D．not having been dealt with

乳腺最常见的良性肿瘤是（）

A.脂肪瘤

B.纤维瘤

C.纤维腺瘤

D. * * 状瘤

E.腺瘤