— Can you explain ____ you have been late for school several times this term?— Sorry, but it is the first time that I have been late this week.

—Was ______ Bill, ______ played basketball very well, ______ helped the blind man cross the road?—Yes, of course. He is always ready to help others. 

 It is only ______ you understand what your parents do to you ______ you can improve your relationship with your parents.

It is exactly _____we behave _____has changed the world.  

I didn’t know it was Sunday       I got to school.