(2013·高考江西卷)He wrote a letter________he explained what had happened in the accident.

Retired French soccer player Zidane said that he happy to do something for children.

Why did they keep trying _________ they must have known it was hopeless?

Do you think it wise for Chinese mothers to try to do everything for their children? —No,that’s they’re mistaken. [ ]

I have already forgotten ______ you bought the computer.