改错！

Dear Xiaohua,

It is four days since Mother accepted the operation.                           76.          

She is feeling much more better. The doctors told me                      77.          

the operation was successful, but because her old age                      78.          

she had to stay in hospital for other two weeks. The                       79.          

doctors also said it was quite necessary for him to                        80.          

do so. We expect to get a full report in two and three                               81.          

days. Please tell the good news to the rest of a family                      82.          

as soon as possible. You didn’t need to come here. I’m                          83.          

able to look after Mother by myself. You’d better                         84.          

send flowers to Mother. She will feel happily.                            85.          

                             Xiaohui

请讲解76、77、84