He seemed as if he ___ his homework when his mother came in.
The stranger shook me by the hand warmly ___ he were to say he knew me well.
The reason _____ he refused to attend the meeting was that they didn’t give him an invitation earlier.
It is _______ he had to send his brother to hospital _______ he was late.
September 11, 2001 is the day ______ we will never forget.
How do you _______it and what should you ________it?