–What do you often do _____________ classes to relax?

--Listen to music or walk around the school.

A．over

B．between

C．through

D．across

一年轻女性 * * 外上象限有一包块与周围分界不清，月经来潮时 * * 胀痛。多为（）

A.乳腺癌

B.乳腺管内 * * 状瘤

C.乳腺囊性增生病

D.慢性乳腺炎

E.Paget病