With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.
No one could _________ the failure of the experiment as everything went smoothly at first.
It was _____ he came back from Africa that year _________ he met the girl he would like to marry.
He determined to teach in a western province, though he _______in the city for a better life.
—Do you think it wise for Chinese parents to try to do everything for their children? —No, that’s they are mistaken.
The role change from husband to father, although difficult, doesn’t seem so great as from wife to mother.