一生中拥有两千项发明的爱迪生从小就比一般孩子更为好奇,学说话似乎就是为了问问题,此外他还善于将许多事情付诸实验。你认为他获得成功的最主要原因是
Bob looks very happy today because he got ______ “A” on his Chinese test.
—_______ do you go walking? — Three times a week.
_______a lot _______ fun.
— Jenny, will you please _______ my dog for three days? — Yes, of course.
---Who cooks dinner in your family? --- My father _________.