He said it was this classroom _______ he found his lost watch and _____ he would take good care of it from then on.
9.―Your job ____ open for your return. ―Thanks.
8.Customers are asked to make sure that they ____ the right change before leaving the shop.
7.Although the causes of cancer ____, we do not yet have any practical way to prevent it.
6.I have to go to work by taxi because my car ____at the garage.
5.---Have you handed in your schoolwork yet? ---Yes,I have. I guess it ____ now.