3.the mother is very glad;her baby is begining__________.

问题描述:

3.the mother is very glad;her baby is begining__________.
a.understanding what she means
b.tounderstanding that she meant
c.to understanding what she means
d.noticing what she means

a.understanding what she means 是正确的.
begin to do sth /begin doing sth 开始做某事 ,根据固定结构排除b,c
d.noticing what she means 不符合句意.
句意是:那位母亲很高兴,她的孩子开始懂得她的意思了.