The old woman has _____ too many hardships in the past 10 years.

 [ ]

A. broken through

B. gone on

C. broken down

D. gone through

若有说明：int a[][3]=1，2，3，4，5，6，7；则数组a第一维的大小是( )。

A) 2
B) 3
C) 4
D) 无确定值