_____in the leg made it impossible for me to walk as fast as usual.

If the babysitter cannot come tomorrow，do you mind________alone at home，doing his homework?

After starting work, Cao spent his evenings _____ in his books and was eventually admitted to a secondary technical school.

There is nothing more I can try _______you to stay, so I wish you good luch.

Many parents happily pay a lot of money, only ______ the tours are not rewarding enough for their children.