To show our respect, we usually have to take our gloves off _____ we are to shake hands with.
In some parts of London, missing a bus means __________ for another hour.
You can't imagine what great trouble they have __________ the problem __________.
The boy was criticized for forgetting __________ his textbooks to school.
Practice __________ English every day, and you will surely improve your spoken English.
—It is better for you to lose weight by taking exercise every morning. —I think your suggestion deserves __________.