To our excitement,two ______ of students ______ a success after three years' hard work.
—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.
The Medical Research Council said it could not _____ use of the new drug without further tests.