1. I didn't think about you yesterday

2. She didn't go to the park

3. The teacher didn't find your memory stick

4. We didn't study the history of county

5. We didn't give Brett a lift to school

1. Did you help Ben?

2. Did you use my phone?

3. Could you get WiFi?

4. Did she buy a new laptop?

5. Were you at home yesterday?

1. C

2. B

3. C

4. A

5. B

4) 1. Media

2. Account

3. Viral

4. Fundraising

5. Forum