_______ with care, one paper-bag will last for six weeks.
He is giving her French lessons in ________ for her teaching him English.
—Could you do me a favor and take these books to my office?—Yes, .
_____ entered the office when I realized that I had forgotten to bring my report.
It is known to all that ____ you exercise regularly, you won’t stay healthy.
Published in 1974,the book was a(n) _____ success and was soon translated into thirteen foreign lanuages.