（湖南省怀化市2014年高三第二次模拟考试）24. My mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it. 

Our English teacher , having explained to us how to design a project, allowed us  a whole week’s preparation and then ______the class. 

All that can be said ______.

-- Who do you think ___ the book here?  --- It may be John. He was sitting here all the morning.

I don’t think she noticed the headmaster just at that moment, for she _______ the game on her cellphone.