The development of industry has been ________ gradual process throughout ________human existence,from stone tools to modern technology.
—I’m going to the stadium ,but I’m afraid I’m not in the right . — .Go ahead.
—I thought you were proud of the work I .—I’m afraid not .You’d better change it for another.
They happen to be of age ,and they all go in for American football.
I have no idea how it that the man met with trouble again.
Going out for a trip with friends popular in the last few years .