Is     necessary to complete the design before National Day?

I still remember how many years _____ was that I quarrelled with her for the first time.

 I was disappointed with the film. I had expected _____ to be much better.

 —Peter, we are good friends. We can help ____.—Yes, you’re right.

Many people complained about the stones scattering on a roadway, but ______ did anything about getting the stone out of the way.