he is only seven.he can go to school.（合并为一句）He is_____ _____ to go to school.还有一道数学题,这是《开放做法本源图》,图中a为几?11 11 2 1 1 3 3 11 4 a 4 1 1 5 10 10 5 1就是居中排列，不好意思我打错了。
问题描述：
he is only seven.he can go to school.（合并为一句）He is_____ _____ to go to school.
还有一道数学题,这是《开放做法本源图》,图中a为几?
1
1 1
1 2 1
1 3 3 1
1 4 a 4 1
1 5 10 10 5 1
就是居中排列，不好意思我打错了。
答
He is___old__ _enough____ to go to school.
悬赏分：5 - 离问题结束还有 14 天 23 小时
a=6
答
a=6 看来你还没有学二项式定理。
答
He is old enough to go to school.
a=6
答
he is old enough to go to school.