Experts say walking is one of the best ways for a person to _____ healthy.
—Now that I’ve finished my exams, I’m going to relax and go for a vocation tomorrow. — _____! I’ve still got two finals to take.
______ at the door before you enter my room, please.
Marry _____ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
_______ with care, one paper-bag will last for six weeks.
---Do you mind my opening the window? ----______I feel a bit cold.