You have been working so hard——I think you _____ a holiday

— Is there any possible way to help the children get rid of such a bad habit? — To be honest, it’s very hard, but we ____ on this problem. [ ]

were many people standing by, but _____ of themwere willing to help the poor boy.

Who _______ the book _______ — It was written by Lu Xun.

As they were walking around, they noticed a man _______ against a tree.