1 The Scientist mixes the formula A. Did the scientist not mixed the formula? B. Didn’t the scientist mix the formula? C. Did not the scientist mix the formula?
2. Is She in the class? A. Isn’t She in the class? B. Wasn’t She in the Class? C. Weren’t She in the class?
3. We were studying English A. We were studied English B. We were study English C. We studied English
4. Economics will be the most popular subject A. Economics was the most popular subject B. Economics were the most popular subject C. Economics is the most popular subject
5. Dina and Dini do a great job A. Did Dina and Dini did a great job? B. Did not Dina and Dini do a great job? C. Did Dina and Dini do a great job?
2. B
3. C
4. A
5. C
2. b
3. c
4. a
5. c