.The development of industry has been________gradual process throughout________human existence,from stone tools to modern technology. (2012·浙江,2)
—Have you been to the Great Wall? —Perhaps not in my memory.________,it might have been during my early childhood.
More than a dozen students in that school ________ abroad for further study every year.
—Mum,I am afraid I won’t do well in the coming test. —Honey,________more careful,________you will make it.
As I looked at the memorial,I thought about ________ terrible disaster it was for the people in Nanjing then and ________ they were to fight the Japanese invaders.
His parents thought only in this way ________ become successful,studying abroad.