第一个可写parents(the first teacher in my life)或teachers(teach me patiently.they are helpful)
第二个就给点参考吧
In my opinion,computers is sometimes essential for our modern education.And I think that the subjects such as history can be learned through the computer,for the reason that we can search for information and more scientific analyses and conclusions So maybe it is better for us to learn history by the computer than by teachers.However,both ways have advantages and disadvantages It depends on whether wework hard