—Do you have _____ trouble finishing the work?—The work is not so difficult as you think． We have finished it already．

 --Did you do _____ interesting yesterday?   --Yes, ______.

 --Excuse me, I want to have my watch fixed, but I can't find a repair shop.--I know___________ nearby. Come on, I'll show you.

---How many students are there in the playground?  ------             .

I hope there are enough books for each student to have ___________.