<span>1.Are our customers from English-speaking countries?</span>
<span>Our customers are not from English-speaking countries. </span>
<span>2.Was there a confidential document in that safe?</span>
<span>There wasn't a confidential document in that safe. </span>
<span>3.Must she know a foreign language in order to be a good secretary?</span>
<span>She mustn't know a foreign language in order to be a good secretary. </span>
<span>4.Does The Earth go round the Sun?</span>
<span>The Earth doesn't go round the Sun. </span>
<span>5.Is Alex getting married next month?</span>
<span>Alex isn't getting married next month. </span>
<span>6.Did the police stop me on my way home last night?</span>
<span>The police didn't stop me on my way home last night. </span>
<span>7. Did Tom wake up early yesterday?</span>
<span>Yesterday Tom didn't wake up early. </span>
<span>8. How many things have happened since I last wrote to you?</span>
<span>Lots of things have not happened since I last wrote to you</span>
<span>9. Will they have business talks tomorrow morning?</span>
<span>They won't have business talks tomorrow morning</span>