However, this was a time _________one had got to have a passbook to live in Johannesburg.

Li Ming was often late for school, ______made our head teacher feel very angry

The school was moved out of downtown as the number of students had grown too________．

Bob, look what you have done! You ruined the experiment.—It’s not my fault. I just carried out the instructions _____.

What color is your backpack –____________.