<ol> <li>Which of the following sentences contains a <b>gerund</b>?</li></ol><br/><ol> <ol> <li>She has been playing soccer since she was twelve years old.</li> <li>Because of teaching, he has a loud voice.</li> <li>They are talking about moving to </st1:country-region>.</li> <li>The school will be opening its doors on Monday.</li></ol></ol>