So many women take up walking as a regular form of exercise every day, which, of course,is        to their health.

—Can I help you，Madame?—Oh，thanks，but I can ______ it myself.

— Will $ 1,000 _____ the cost of the trip?　　　　— I’m afraid not. Perhaps I need _____ $ 400.

When they saw they were surrounded by our troops, the enemies soldiers          .

She would lend me the money if I promised to ________ within a month.