9. complete the sentences (active or passive voice). use simple present. 1. he (sell) … cars. 2. the blue car (sell) … . 3. in summer, more ice-cream (eat) … than in winter. 4. she (call) … her grandparents every friday. 5. the letters (type) … . 6. he (take) … his medicine every day. 7. jane (take / not) … to school by her father. 8. we (go) … to school by bus. 9. she (work / not) … for a bank. 10. milk (keep) … in the refrigerator.

Below are the completed sentences in the Simple Present tense, using either the active or passive voice as required by the context:

1. He sells cars. (Active voice: the subject performs the action)
2. The blue car is sold. (Passive voice: the subject receives the action)
3. In summer, more ice-cream is eaten than in winter. (Passive voice: the subject receives the action)
4. She calls her grandparents every Friday. (Active voice: the subject performs the action)
5. The letters are typed. (Passive voice: plural subject receives the action)
6. He takes his medicine every day. (Active voice: the subject performs the action)
7. Jane is not taken to school by her father. (Passive voice: negative form, the subject receives the action)
8. We go to school by bus. (Active voice: the subject performs the action)
9. She does not work for a bank. (Active voice: negative form using the auxiliary verb "does")
10. Milk is kept in the refrigerator. (Passive voice: the subject receives the action)

Please specify if you would like explanations for the grammar rules used or additional exercises to practice these structures.