It’s a very interesting book.— ________.— And thank you very much for letting me keep it so long.

No sooner ________in the distance ______a storm began to pour

He began to take political science _______ only when he left school.

I saw them ___football on the playground when I passedby.

All the students are cleaning. ________ are cleaning thefloor, and ________ are cleaning the desks.