若有说明：inta[][3]={{1，2，3}，{4，5}，{6，7}}；则数组a的第一维的大小为：（）
A.2
B.3
C.4
D.无确定值
参考答案：B
After a serious illness, he finally _____ the importance of health. But it was too late. [ ]
A. regarded
B. mattered
C. realized
D. added
