【简答题】Fill in the blanks with the expressions given below. Change the form where necessary. Each expression can be used only once. be serious about make sense run into distinguish between thrust upon be att...
【简答题】Dear human beings , Hi ! I’m 80 years old now , s o I’ve seen much of the world. We’ve lived on Earth with you for t 1 of years. Each day we r 2 oxygen and remove h armful gas so that you have p 3 air...