—Why did you leave the lights burning? —Heavens! I guess I to turn them off.
We should be able to ________ enough money for your ticket.
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.